Search Class 10 Questions

100 results found for "nature-of-roots" in Class 10.

समीकरण \(2x^2-11x+15=0\) के मूलों की प्रकृति क्या है?

What is the nature of roots of \(2x^2-11x+15=0\)?

Explanation opens after your attempt
Correct Answer

A. दो वास्तविक परिमेय और असमान ((D=1))Two real rational and distinct ((D=1))

Step 1

Concept

Here (D=(-11)2-4(2)(15)=1). A positive perfect-square (D) gives rational distinct roots.

Step 2

Why this answer is correct

The correct answer is A. दो वास्तविक परिमेय और असमान ((D=1)) / Two real rational and distinct ((D=1)). Here (D=(-11)2-4(2)(15)=1). A positive perfect-square (D) gives rational distinct roots.

Step 3

Exam Tip

यहाँ (D=(-11)2-4(2)(15)=1) है। धनात्मक पूर्ण वर्ग (D) परिमेय असमान मूल देता है।

Open Question Page
Ask Friends

समीकरण \(x^2-5x+3=0\) के मूलों की प्रकृति क्या है?

What is the nature of roots of the equation \(x^2-5x+3=0\)?

Explanation opens after your attempt
Correct Answer

A. वास्तविक, अपरिमेय और भिन्नReal, irrational and distinct

Step 1

Concept

Here (D=(-5)2-4(1)(3)=13), and (13) is not a perfect square. So the roots are real, irrational and distinct.

Step 2

Why this answer is correct

The correct answer is A. वास्तविक, अपरिमेय और भिन्न / Real, irrational and distinct. Here (D=(-5)2-4(1)(3)=13), and (13) is not a perfect square. So the roots are real, irrational and distinct.

Step 3

Exam Tip

यहाँ (D=(-5)2-4(1)(3)=13) है और (13) पूर्ण वर्ग नहीं है। इसलिए मूल वास्तविक, अपरिमेय और भिन्न हैं।

Open Question Page
Ask Friends

समीकरण \(3x^2+10x+3=0\) के मूलों की प्रकृति क्या है?

What is the nature of roots of \(3x^2+10x+3=0\)?

Explanation opens after your attempt
Correct Answer

A. दो वास्तविक और असमानtwo real and distinct

Step 1

Concept

(D=102-4(3)(3)=64>0). Therefore the roots are real and distinct.

Step 2

Why this answer is correct

The correct answer is A. दो वास्तविक और असमान / two real and distinct. (D=102-4(3)(3)=64>0). Therefore the roots are real and distinct.

Step 3

Exam Tip

(D=102-4(3)(3)=64>0) है। इसलिए मूल वास्तविक और असमान हैं।

Open Question Page
Ask Friends

यदि \(x^2-6x+c=0\) की जड़ें \(\alpha,\beta\) हैं और \(\alpha^2+\beta^2=26\), तो जड़ें क्या हैं?

If \(\alpha,\beta\) are roots of \(x^2-6x+c=0\) and \(\alpha^2+\beta^2=26\), what are the roots?

Explanation opens after your attempt
Correct Answer

A. (1) और (5)(1) and (5)

Step 1

Concept

Here \(\alpha+\beta=6\) and \(\alpha^2+\beta^2=26\). From \(36-2\alpha\beta=26\), \(\alpha\beta=5\), so the roots are (1) and (5).

Step 2

Why this answer is correct

The correct answer is A. (1) और (5) / (1) and (5). Here \(\alpha+\beta=6\) and \(\alpha^2+\beta^2=26\). From \(36-2\alpha\beta=26\), \(\alpha\beta=5\), so the roots are (1) and (5).

Step 3

Exam Tip

\(\alpha+\beta=6\) और \(\alpha^2+\beta^2=26\) है। \(36-2\alpha\beta=26\) से \(\alpha\beta=5\), इसलिए जड़ें (1) और (5) हैं।

Open Question Page
Ask Friends

\(x^2+12x+\lambda=0\) की जड़ें वास्तविक भिन्न और दोनों ऋणात्मक हों, तो \(\lambda\) पर सही शर्त क्या है?

For \(x^2+12x+\lambda=0\) to have real distinct roots and both negative roots, what is the correct condition on \(\lambda\)?

Explanation opens after your attempt
Correct Answer

A. \(0<\lambda<36\)

Step 1

Concept

For both roots to be negative, the sum (-12) and product \(\lambda>0\) are needed. For real distinct roots, \(144-4\lambda>0\), so \(0<\lambda<36\).

Step 2

Why this answer is correct

The correct answer is A. \(0<\lambda<36\). For both roots to be negative, the sum (-12) and product \(\lambda>0\) are needed. For real distinct roots, \(144-4\lambda>0\), so \(0<\lambda<36\).

Step 3

Exam Tip

दोनों ऋणात्मक जड़ों के लिए योग (-12) और गुणनफल \(\lambda>0\) चाहिए। वास्तविक भिन्न जड़ों के लिए \(144-4\lambda>0\), इसलिए \(0<\lambda<36\)।

Open Question Page
Ask Friends

यदि \(x^2-7x+12=0\) की जड़ें \(\alpha,\beta\) हैं, तो \(2\alpha+3\) और \(2\beta+3\) जड़ों वाला समीकरण कौन-सा है?

If \(\alpha,\beta\) are the roots of \(x^2-7x+12=0\), which equation has roots \(2\alpha+3\) and \(2\beta+3\)?

Explanation opens after your attempt
Correct Answer

A. \(x^2-20x+99=0\)

Step 1

Concept

The original roots are (3) and (4). The new roots are (9) and (11), so the equation is \(x^2-20x+99=0\).

Step 2

Why this answer is correct

The correct answer is A. \(x^2-20x+99=0\). The original roots are (3) and (4). The new roots are (9) and (11), so the equation is \(x^2-20x+99=0\).

Step 3

Exam Tip

मूल जड़ें (3) और (4) हैं। नई जड़ें (9) और (11) हैं, इसलिए समीकरण \(x^2-20x+99=0\) है।

Open Question Page
Ask Friends

यदि \(x^2-5x+6=0\) की जड़ें \(\alpha,\beta\) हैं, तो \(\alpha+\beta\) और \(\alpha\beta\) जड़ों वाला समीकरण कौन-सा है?

If \(\alpha,\beta\) are roots of \(x^2-5x+6=0\), which equation has roots \(\alpha+\beta\) and \(\alpha\beta\)?

Explanation opens after your attempt
Correct Answer

A. \(x^2-11x+30=0\)

Step 1

Concept

Here \(\alpha+\beta=5\) and \(\alpha\beta=6\). The new roots are (5) and (6), so the equation is \(x^2-11x+30=0\).

Step 2

Why this answer is correct

The correct answer is A. \(x^2-11x+30=0\). Here \(\alpha+\beta=5\) and \(\alpha\beta=6\). The new roots are (5) and (6), so the equation is \(x^2-11x+30=0\).

Step 3

Exam Tip

\(\alpha+\beta=5\) और \(\alpha\beta=6\) हैं। नई जड़ें (5) और (6) हैं, इसलिए समीकरण \(x^2-11x+30=0\) है।

Open Question Page
Ask Friends

यदि \(x^2-5x+c=0\) की जड़ें \(\alpha,\beta\) हैं और \(\alpha^2+\beta^2=17\), तो जड़ें क्या हैं?

If \(\alpha,\beta\) are roots of \(x^2-5x+c=0\) and \(\alpha^2+\beta^2=17\), what are the roots?

Explanation opens after your attempt
Correct Answer

A. (1) और (4)(1) and (4)

Step 1

Concept

Here \(\alpha+\beta=5\) and \(\alpha^2+\beta^2=17\). From \(25-2\alpha\beta=17\), \(\alpha\beta=4\), so the roots are (1) and (4).

Step 2

Why this answer is correct

The correct answer is A. (1) और (4) / (1) and (4). Here \(\alpha+\beta=5\) and \(\alpha^2+\beta^2=17\). From \(25-2\alpha\beta=17\), \(\alpha\beta=4\), so the roots are (1) and (4).

Step 3

Exam Tip

\(\alpha+\beta=5\) और \(\alpha^2+\beta^2=17\) है। \(25-2\alpha\beta=17\) से \(\alpha\beta=4\), इसलिए जड़ें (1) और (4) हैं।

Open Question Page
Ask Friends

\(x^2+10x+\lambda=0\) की जड़ें वास्तविक भिन्न और दोनों ऋणात्मक हों, तो \(\lambda\) पर सही शर्त क्या है?

For \(x^2+10x+\lambda=0\) to have real distinct roots and both negative roots, what is the correct condition on \(\lambda\)?

Explanation opens after your attempt
Correct Answer

B. \(0<\lambda<25\)

Step 1

Concept

For both roots to be negative, the sum (-10) and product \(\lambda>0\) are needed. For real distinct roots, \(100-4\lambda>0\), hence \(0<\lambda<25\).

Step 2

Why this answer is correct

The correct answer is B. \(0<\lambda<25\). For both roots to be negative, the sum (-10) and product \(\lambda>0\) are needed. For real distinct roots, \(100-4\lambda>0\), hence \(0<\lambda<25\).

Step 3

Exam Tip

दोनों ऋणात्मक जड़ों के लिए योग (-10) और गुणनफल \(\lambda>0\) चाहिए। वास्तविक भिन्न जड़ों के लिए \(100-4\lambda>0\), इसलिए \(0<\lambda<25\)।

Open Question Page
Ask Friends

यदि \(x^2-9x+14=0\) की जड़ें \(\alpha,\beta\) हैं, तो \(\alpha-3\) और \(\beta-3\) जड़ों वाला समीकरण कौन-सा है?

If \(\alpha,\beta\) are the roots of \(x^2-9x+14=0\), which equation has roots \(\alpha-3\) and \(\beta-3\)?

Explanation opens after your attempt
Correct Answer

A. \(x^2-3x-4=0\)

Step 1

Concept

The original roots are (2) and (7). The new roots are (-1) and (4), so the equation is \(x^2-3x-4=0\).

Step 2

Why this answer is correct

The correct answer is A. \(x^2-3x-4=0\). The original roots are (2) and (7). The new roots are (-1) and (4), so the equation is \(x^2-3x-4=0\).

Step 3

Exam Tip

मूल जड़ें (2) और (7) हैं। नई जड़ें (-1) और (4) होंगी, इसलिए समीकरण \(x^2-3x-4=0\) है।

Open Question Page
Ask Friends

यदि \(x^2-4x+c=0\) की जड़ें \(\alpha,\beta\) हैं और \(\alpha^2+\beta^2=10\), तो समीकरण की जड़ें क्या हैं?

If \(\alpha,\beta\) are roots of \(x^2-4x+c=0\) and \(\alpha^2+\beta^2=10\), what are the roots of the equation?

Explanation opens after your attempt
Correct Answer

A. (1) और (3)(1) and (3)

Step 1

Concept

Here \(\alpha+\beta=4\) and \(\alpha^2+\beta^2=10\). From \(16-2\alpha\beta=10\), \(\alpha\beta=3\), so the roots are (1) and (3).

Step 2

Why this answer is correct

The correct answer is A. (1) और (3) / (1) and (3). Here \(\alpha+\beta=4\) and \(\alpha^2+\beta^2=10\). From \(16-2\alpha\beta=10\), \(\alpha\beta=3\), so the roots are (1) and (3).

Step 3

Exam Tip

\(\alpha+\beta=4\) और \(\alpha^2+\beta^2=10\) है। \(16-2\alpha\beta=10\) से \(\alpha\beta=3\), इसलिए जड़ें (1) और (3) हैं।

Open Question Page
Ask Friends

\(x^2+2x+\lambda=0\) की जड़ें वास्तविक और भिन्न हों तथा दोनों ऋणात्मक हों, तो \(\lambda\) पर सही शर्त क्या है?

For \(x^2+2x+\lambda=0\) to have real distinct roots and both negative roots, what is the correct condition on \(\lambda\)?

Explanation opens after your attempt
Correct Answer

A. \(0<\lambda<1\)

Step 1

Concept

For both roots to be negative, the sum (-2) and product \(\lambda>0\) are needed. For real distinct roots, \(4-4\lambda>0\), hence \(0<\lambda<1\).

Step 2

Why this answer is correct

The correct answer is A. \(0<\lambda<1\). For both roots to be negative, the sum (-2) and product \(\lambda>0\) are needed. For real distinct roots, \(4-4\lambda>0\), hence \(0<\lambda<1\).

Step 3

Exam Tip

दोनों ऋणात्मक जड़ों के लिए योग (-2) और गुणनफल \(\lambda>0\) चाहिए। वास्तविक भिन्न जड़ों के लिए \(4-4\lambda>0\), इसलिए \(0<\lambda<1\)।

Open Question Page
Ask Friends

यदि \(x^2-6x+5=0\) की जड़ें \(\alpha,\beta\) हैं, तो \(3\alpha-2\) और \(3\beta-2\) जड़ों वाला समीकरण कौन-सा है?

If \(\alpha,\beta\) are the roots of \(x^2-6x+5=0\), which equation has roots \(3\alpha-2\) and \(3\beta-2\)?

Explanation opens after your attempt
Correct Answer

A. \(x^2-14x+13=0\)

Step 1

Concept

The original roots are (1) and (5), so the new roots are (1) and (13). Their equation is \(x^2-14x+13=0\).

Step 2

Why this answer is correct

The correct answer is A. \(x^2-14x+13=0\). The original roots are (1) and (5), so the new roots are (1) and (13). Their equation is \(x^2-14x+13=0\).

Step 3

Exam Tip

मूल जड़ें (1) और (5) हैं, इसलिए नई जड़ें (1) और (13) हैं। उनका समीकरण \(x^2-14x+13=0\) है।

Open Question Page
Ask Friends

यदि \(x^2+px+q=0\) की जड़ें \(\alpha,\beta\) हैं और \(\alpha+1,\beta+1\), \(x^2-5x+6=0\) की जड़ें हैं, तो (p,q) क्या होंगे?

If \(\alpha,\beta\) are the roots of \(x^2+px+q=0\) and \(\alpha+1,\beta+1\) are the roots of \(x^2-5x+6=0\), what are (p,q)?

Explanation opens after your attempt
Correct Answer

A. (p=-3,\ q=2)

Step 1

Concept

The sum of new roots is \(\alpha+\beta+2=5\), so (p=-3). From product (q-p+1=6), we get (q=2).

Step 2

Why this answer is correct

The correct answer is A. (p=-3,\ q=2). The sum of new roots is \(\alpha+\beta+2=5\), so (p=-3). From product (q-p+1=6), we get (q=2).

Step 3

Exam Tip

नई जड़ों का योग \(\alpha+\beta+2=5\) है, इसलिए (p=-3)। गुणनफल (q-p+1=6) से (q=2) मिलता है।

Open Question Page
Ask Friends

यदि \(x^2-3x-2=0\) की जड़ें \(\alpha,\beta\) हैं, तो \(\alpha^2,\beta^2\) जड़ों वाला समीकरण कौन-सा है?

If \(\alpha,\beta\) are the roots of \(x^2-3x-2=0\), which equation has roots \(\alpha^2,\beta^2\)?

Explanation opens after your attempt
Correct Answer

A. \(x^2-13x+4=0\)

Step 1

Concept

Here \(\alpha+\beta=3\) and \(\alpha\beta=-2\). Thus \(\alpha^2+\beta^2=13\) and \(\alpha^2\beta^2=4\), so the equation is \(x^2-13x+4=0\).

Step 2

Why this answer is correct

The correct answer is A. \(x^2-13x+4=0\). Here \(\alpha+\beta=3\) and \(\alpha\beta=-2\). Thus \(\alpha^2+\beta^2=13\) and \(\alpha^2\beta^2=4\), so the equation is \(x^2-13x+4=0\).

Step 3

Exam Tip

\(\alpha+\beta=3\) और \(\alpha\beta=-2\) है। इसलिए \(\alpha^2+\beta^2=13\) और \(\alpha^2\beta^2=4\), अतः समीकरण \(x^2-13x+4=0\) है।

Open Question Page
Ask Friends

\(x^2-5x+6=0\) की जड़ें \(\alpha,\beta\) हैं। \(\alpha+1,\beta+1\) जड़ों वाला समीकरण कौन-सा है?

The roots of \(x^2-5x+6=0\) are \(\alpha,\beta\). Which equation has roots \(\alpha+1,\beta+1\)?

Explanation opens after your attempt
Correct Answer

A. \(x^2-7x+12=0\)

Step 1

Concept

The original roots are (2) and (3), so the new roots are (3) and (4). Their equation is \(x^2-7x+12=0\).

Step 2

Why this answer is correct

The correct answer is A. \(x^2-7x+12=0\). The original roots are (2) and (3), so the new roots are (3) and (4). Their equation is \(x^2-7x+12=0\).

Step 3

Exam Tip

मूल जड़ें (2) और (3) हैं, इसलिए नई जड़ें (3) और (4) होंगी। उनका समीकरण \(x^2-7x+12=0\) है।

Open Question Page
Ask Friends

यदि \(3x^2-10x+3=0\) की जड़ें \(\alpha,\beta\) हैं, तो \(\frac{1}{\alpha},\frac{1}{\beta}\) जड़ों वाला समीकरण कौन-सा है?

If \(\alpha,\beta\) are the roots of \(3x^2-10x+3=0\), which equation has roots \(\frac{1}{\alpha},\frac{1}{\beta}\)?

Explanation opens after your attempt
Correct Answer

A. \(3x^2-10x+3=0\)

Step 1

Concept

Here \(\alpha+\beta=\frac{10}{3}\) and \(\alpha\beta=1\). The reciprocal roots also have sum \(\frac{10}{3}\) and product (1).

Step 2

Why this answer is correct

The correct answer is A. \(3x^2-10x+3=0\). Here \(\alpha+\beta=\frac{10}{3}\) and \(\alpha\beta=1\). The reciprocal roots also have sum \(\frac{10}{3}\) and product (1).

Step 3

Exam Tip

यहाँ \(\alpha+\beta=\frac{10}{3}\) और \(\alpha\beta=1\) है। व्युत्क्रम जड़ों का योग \(\frac{10}{3}\) और गुणनफल (1) ही रहता है।

Open Question Page
Ask Friends

कथन: \(x^2+3x+7=0\) के वास्तविक मूल नहीं हैं। कारण: (D<0) होने पर वास्तविक मूल नहीं होते। सही विकल्प चुनिए।

Assertion: \(x^2+3x+7=0\) has no real roots. Reason: When (D<0), real roots do not exist. Choose the correct option.

Explanation opens after your attempt
Correct Answer

A. कथन और कारण दोनों सही हैंBoth assertion and reason are correct

Step 1

Concept

Here (D=32-4(1)(7)=-19). Since (D<0), the assertion is correct.

Step 2

Why this answer is correct

The correct answer is A. कथन और कारण दोनों सही हैं / Both assertion and reason are correct. Here (D=32-4(1)(7)=-19). Since (D<0), the assertion is correct.

Step 3

Exam Tip

यहाँ (D=32-4(1)(7)=-19) है। (D<0) होने से कथन सही है।

Open Question Page
Ask Friends

समीकरण \(x^2-2\sqrt{5}x+1=0\) के मूलों की प्रकृति चुनिए।

Choose the nature of roots of \(x^2-2\sqrt{5}x+1=0\).

Explanation opens after your attempt
Correct Answer

A. वास्तविक, अपरिमेय और भिन्नReal, irrational and distinct

Step 1

Concept

Here (D=\(2\sqrt{5}\)2-4(1)(1)=16>0). The roots are \(\sqrt{5}\pm2\), so they are irrational and distinct.

Step 2

Why this answer is correct

The correct answer is A. वास्तविक, अपरिमेय और भिन्न / Real, irrational and distinct. Here (D=\(2\sqrt{5}\)2-4(1)(1)=16>0). The roots are \(\sqrt{5}\pm2\), so they are irrational and distinct.

Step 3

Exam Tip

यहाँ (D=\(2\sqrt{5}\)2-4(1)(1)=16>0) है। मूल \(\sqrt{5}\pm2\) होंगे, इसलिए वे अपरिमेय और भिन्न हैं।

Open Question Page
Ask Friends

समीकरण ((r+2)x-2-2(r+5)x+(r+2)=0) के वास्तविक और समान मूलों के लिए (r) का मान क्या होगा?

What will be the value of (r) for real and equal roots of ((r+2)x-2-2(r+5)x+(r+2)=0)?

Explanation opens after your attempt
Correct Answer

A. \(r=-\frac{7}{2}\)

Step 1

Concept

For equal roots, (D=0) is required. Here (D=12(2r+7)), so \(r=-\frac{7}{2}\).

Step 2

Why this answer is correct

The correct answer is A. \(r=-\frac{7}{2}\). For equal roots, (D=0) is required. Here (D=12(2r+7)), so \(r=-\frac{7}{2}\).

Step 3

Exam Tip

समान मूलों के लिए (D=0) चाहिए। यहाँ (D=12(2r+7)), इसलिए \(r=-\frac{7}{2}\)।

Open Question Page
Ask Friends

यदि \(ax^2+bx+c=0\) में \(a\neq0\) और मूल वास्तविक तथा समान हैं, तो सही शर्त कौन सी है?

If \(a\neq0\) in \(ax^2+bx+c=0\) and the roots are real and equal, which condition is correct?

Explanation opens after your attempt
Correct Answer

A. \(b^2=4ac\)

Step 1

Concept

For equal real roots, \(D=b^2-4ac=0\) is required. Hence \(b^2=4ac\) is the correct condition.

Step 2

Why this answer is correct

The correct answer is A. \(b^2=4ac\). For equal real roots, \(D=b^2-4ac=0\) is required. Hence \(b^2=4ac\) is the correct condition.

Step 3

Exam Tip

समान वास्तविक मूलों के लिए \(D=b^2-4ac=0\) होना चाहिए। इसलिए \(b^2=4ac\) सही शर्त है।

Open Question Page
Ask Friends

समीकरण \(x^2-6x+13=0\) के वास्तविक मूलों के बारे में क्या सही है?

What is correct about the real roots of the equation \(x^2-6x+13=0\)?

Explanation opens after your attempt
Correct Answer

A. कोई वास्तविक मूल नहींNo real roots

Step 1

Concept

Here (D=(-6)2-4(1)(13)=-16<0). Therefore there is no real root.

Step 2

Why this answer is correct

The correct answer is A. कोई वास्तविक मूल नहीं / No real roots. Here (D=(-6)2-4(1)(13)=-16<0). Therefore there is no real root.

Step 3

Exam Tip

यहाँ (D=(-6)2-4(1)(13)=-16<0) है। इसलिए कोई वास्तविक मूल नहीं है।

Open Question Page
Ask Friends

(x-2-2x+\(a^2+3\)=0) की जड़ों की प्रकृति क्या है?

What is the nature of the roots of (x-2-2x+\(a^2+3\)=0)?

Explanation opens after your attempt
Correct Answer

A. हर वास्तविक (a) के लिए वास्तविक नहींNot real for every real (a)

Step 1

Concept

The discriminant is (D=4-4\(a^2+3\)=-4a-2-8). It is negative for every real (a), so the roots are not real.

Step 2

Why this answer is correct

The correct answer is A. हर वास्तविक (a) के लिए वास्तविक नहीं / Not real for every real (a). The discriminant is (D=4-4\(a^2+3\)=-4a-2-8). It is negative for every real (a), so the roots are not real.

Step 3

Exam Tip

विविक्तकर (D=4-4\(a^2+3\)=-4a-2-8) है। यह हर वास्तविक (a) के लिए ऋणात्मक है, इसलिए जड़ें वास्तविक नहीं हैं।

Open Question Page
Ask Friends

(x-2-2x+\(a^2+2\)=0) की जड़ों की प्रकृति क्या है?

What is the nature of the roots of (x-2-2x+\(a^2+2\)=0)?

Explanation opens after your attempt
Correct Answer

C. हर (a) के लिए वास्तविक नहींNot real for every (a)

Step 1

Concept

The discriminant is (D=4-4\(a^2+2\)=-4\(a^2+1\)). It is negative for every real (a), so the roots are not real.

Step 2

Why this answer is correct

The correct answer is C. हर (a) के लिए वास्तविक नहीं / Not real for every (a). The discriminant is (D=4-4\(a^2+2\)=-4\(a^2+1\)). It is negative for every real (a), so the roots are not real.

Step 3

Exam Tip

विविक्तकर (D=4-4\(a^2+2\)=-4\(a^2+1\)) है। यह हर वास्तविक (a) के लिए ऋणात्मक है, इसलिए जड़ें वास्तविक नहीं हैं।

Open Question Page
Ask Friends

(x-2-2x+\(a^2+1\)=0) की जड़ों की प्रकृति क्या है?

What is the nature of the roots of (x-2-2x+\(a^2+1\)=0)?

Explanation opens after your attempt
Correct Answer

A. (a=0) पर समान वास्तविक, अन्यथा वास्तविक नहींEqual real at (a=0), otherwise not real

Step 1

Concept

The discriminant is (D=4-4\(a^2+1\)=-4a-2). Thus (D=0) at (a=0), and (D<0) when \(a\neq0\).

Step 2

Why this answer is correct

The correct answer is A. (a=0) पर समान वास्तविक, अन्यथा वास्तविक नहीं / Equal real at (a=0), otherwise not real. The discriminant is (D=4-4\(a^2+1\)=-4a-2). Thus (D=0) at (a=0), and (D<0) when \(a\neq0\).

Step 3

Exam Tip

विविक्तकर (D=4-4\(a^2+1\)=-4a-2) है। इसलिए (a=0) पर (D=0), और \(a\neq0\) पर (D<0)।

Open Question Page
Ask Friends

\(x^2-2\sqrt{3}x+3=0\) की जड़ों की प्रकृति क्या है?

What is the nature of the roots of \(x^2-2\sqrt{3}x+3=0\)?

Explanation opens after your attempt
Correct Answer

B. दो समान वास्तविकTwo equal real

Step 1

Concept

Here (D=\(-2\sqrt{3}\)2-4(1)(3)=0). Therefore the roots are equal and real.

Step 2

Why this answer is correct

The correct answer is B. दो समान वास्तविक / Two equal real. Here (D=\(-2\sqrt{3}\)2-4(1)(3)=0). Therefore the roots are equal and real.

Step 3

Exam Tip

यहाँ (D=\(-2\sqrt{3}\)2-4(1)(3)=0) है। इसलिए दोनों जड़ें समान वास्तविक हैं।

Open Question Page
Ask Friends

समीकरण (x-2+2(3u+1)x+9u-2-6u+5=0) के मूलों की प्रकृति क्या है?

What is the nature of roots of (x-2+2(3u+1)x+9u-2-6u+5=0)?

Explanation opens after your attempt
Correct Answer

A. हमेशा वास्तविक और भिन्नAlways real and distinct

Step 1

Concept

Here (D=4(3u+1)2-4\(9u^2-6u+5\)=48u-16). Thus the nature depends on (u), not always distinct.

Step 2

Why this answer is correct

The correct answer is A. हमेशा वास्तविक और भिन्न / Always real and distinct. Here (D=4(3u+1)2-4\(9u^2-6u+5\)=48u-16). Thus the nature depends on (u), not always distinct.

Step 3

Exam Tip

यहाँ (D=4(3u+1)2-4\(9u^2-6u+5\)=48u-16) है। अतः प्रकृति (u) पर निर्भर करेगी, हमेशा भिन्न नहीं होगी।

Open Question Page
Ask Friends

यदि द्विघात समीकरण \(ax^2+bx+c=0\) में (D<0) हो, तो मूलों की प्रकृति क्या होगी?

If a quadratic equation \(ax^2+bx+c=0\) has (D<0), what will be the nature of roots?

Explanation opens after your attempt
Correct Answer

A. कोई वास्तविक मूल नहीं ((D<0))No real roots ((D<0))

Step 1

Concept

When (D<0), real roots do not exist. In exams first check the sign of \(D=b^2-4ac\).

Step 2

Why this answer is correct

The correct answer is A. कोई वास्तविक मूल नहीं ((D<0)) / No real roots ((D<0)). When (D<0), real roots do not exist. In exams first check the sign of \(D=b^2-4ac\).

Step 3

Exam Tip

जब (D<0) होता है, तब वास्तविक मूल नहीं मिलते। परीक्षा में \(D=b^2-4ac\) का चिन्ह पहले देखें।

Open Question Page
Ask Friends

समीकरण \(x^2-5x+6=0\) के मूलों की प्रकृति बताइए।

State the nature of roots of \(x^2-5x+6=0\).

Explanation opens after your attempt
Correct Answer

A. दो वास्तविक और असमान ((D=1))Two real and distinct ((D=1))

Step 1

Concept

Here (D=(-5)2-4(1)(6)=1), so the roots are real and distinct. A perfect-square (D) gives rational roots.

Step 2

Why this answer is correct

The correct answer is A. दो वास्तविक और असमान ((D=1)) / Two real and distinct ((D=1)). Here (D=(-5)2-4(1)(6)=1), so the roots are real and distinct. A perfect-square (D) gives rational roots.

Step 3

Exam Tip

यहाँ (D=(-5)2-4(1)(6)=1) है, इसलिए मूल वास्तविक और असमान हैं। पूर्ण वर्ग (D) से मूल परिमेय होते हैं।

Open Question Page
Ask Friends

यदि द्विघात समीकरण \(ax^2+bx+c=0\) में \(D=b^2-4ac\) हो, तो (D>0) होने पर मूलों की प्रकृति क्या होगी?

If a quadratic equation \(ax^2+bx+c=0\) has \(D=b^2-4ac\), what is the nature of roots when (D>0)?

Explanation opens after your attempt
Correct Answer

A. दो वास्तविक और असमान ((D>0))Two real and distinct ((D>0))

Step 1

Concept

Because (D>0) gives two different real roots. In exams first find (D).

Step 2

Why this answer is correct

The correct answer is A. दो वास्तविक और असमान ((D>0)) / Two real and distinct ((D>0)). Because (D>0) gives two different real roots. In exams first find (D).

Step 3

Exam Tip

क्योंकि (D>0) होने पर दो अलग वास्तविक मूल मिलते हैं। परीक्षा में पहले (D) निकालें।

Open Question Page
Ask Friends

समीकरण \(2x^2+7x+3=0\) के मूलों की प्रकृति बताइए।

State the nature of roots of \(2x^2+7x+3=0\).

Explanation opens after your attempt
Correct Answer

A. वास्तविक, परिमेय और भिन्नReal, rational and distinct

Step 1

Concept

(D=25>0) and it is a perfect square. Hence the roots are real, rational and distinct.

Step 2

Why this answer is correct

The correct answer is A. वास्तविक, परिमेय और भिन्न / Real, rational and distinct. (D=25>0) and it is a perfect square. Hence the roots are real, rational and distinct.

Step 3

Exam Tip

(D=25>0) और पूर्ण वर्ग है। इसलिए मूल वास्तविक, परिमेय और भिन्न हैं।

Open Question Page
Ask Friends

समीकरण \(2x^2+4x+2=0\) के मूलों की प्रकृति बताइए।

State the nature of roots of the equation \(2x^2+4x+2=0\).

Explanation opens after your attempt
Correct Answer

A. वास्तविक और समानReal and equal

Step 1

Concept

Because (D=0), the roots are real and equal. (D=0) is the sign of equal roots.

Step 2

Why this answer is correct

The correct answer is A. वास्तविक और समान / Real and equal. Because (D=0), the roots are real and equal. (D=0) is the sign of equal roots.

Step 3

Exam Tip

क्योंकि (D=0) है इसलिए मूल वास्तविक और समान हैं। (D=0) बराबर मूलों की पहचान है।

Open Question Page
Ask Friends

समीकरण \(x^2-3x+2=0\) के मूलों की प्रकृति क्या है?

What is the nature of roots of the equation \(x^2-3x+2=0\)?

Explanation opens after your attempt
Correct Answer

A. वास्तविक, परिमेय और भिन्नReal, rational and distinct

Step 1

Concept

Here (D=1>0) and (1) is a perfect square. So the roots are real, rational and distinct.

Step 2

Why this answer is correct

The correct answer is A. वास्तविक, परिमेय और भिन्न / Real, rational and distinct. Here (D=1>0) and (1) is a perfect square. So the roots are real, rational and distinct.

Step 3

Exam Tip

इसमें (D=1>0) है और (1) पूर्ण वर्ग है। इसलिए मूल वास्तविक, परिमेय और भिन्न हैं।

Open Question Page
Ask Friends

द्विघात समीकरण \(ax^2+bx+c=0\) में मूलों की प्रकृति जानने के लिए किस राशि का उपयोग किया जाता है?

Which quantity is used to know the nature of roots of the quadratic equation \(ax^2+bx+c=0\)?

Explanation opens after your attempt
Correct Answer

A. विविक्तकर \(D=b^2-4ac\)Discriminant \(D=b^2-4ac\)

Step 1

Concept

The nature of roots is decided by \(D=b^2-4ac\). In exams first identify (a), (b), and (c).

Step 2

Why this answer is correct

The correct answer is A. विविक्तकर \(D=b^2-4ac\) / Discriminant \(D=b^2-4ac\). The nature of roots is decided by \(D=b^2-4ac\). In exams first identify (a), (b), and (c).

Step 3

Exam Tip

मूलों की प्रकृति \(D=b^2-4ac\) से तय होती है। परीक्षा में पहले (a), (b), (c) पहचानें।

Open Question Page
Ask Friends

द्विघात समीकरण \(ax^2+bx+c=0\) के मूलों की प्रकृति जानने के लिए कौन सा व्यंजक प्रयोग होता है?

Which expression is used to determine the nature of roots of the quadratic equation \(ax^2+bx+c=0\)?

Explanation opens after your attempt
Correct Answer

A. \(b^2-4ac\)

Step 1

Concept

The discriminant is \(D=b^2-4ac\). In exams first identify (a,b,c) correctly.

Step 2

Why this answer is correct

The correct answer is A. \(b^2-4ac\). The discriminant is \(D=b^2-4ac\). In exams first identify (a,b,c) correctly.

Step 3

Exam Tip

विविक्तकर \(D=b^2-4ac\) होता है। परीक्षा में पहले (a,b,c) सही पहचानें।

Open Question Page
Ask Friends

यदि \(kx^2-12x+k=0\) की जड़ें वास्तविक और व्युत्क्रम हैं, तो (k) पर सही शर्त क्या है?

If \(kx^2-12x+k=0\) has real reciprocal roots, what is the correct condition on (k)?

Explanation opens after your attempt
Correct Answer

A. \(k\neq0\) और \(k^2\le36\)\(k\neq0\) and \(k^2\le36\)

Step 1

Concept

The product of roots is \(\frac{k}{k}=1\), so \(k\neq0\) is needed. For real roots, \(144-4k^2\ge0\), hence \(k^2\le36\).

Step 2

Why this answer is correct

The correct answer is A. \(k\neq0\) और \(k^2\le36\) / \(k\neq0\) and \(k^2\le36\). The product of roots is \(\frac{k}{k}=1\), so \(k\neq0\) is needed. For real roots, \(144-4k^2\ge0\), hence \(k^2\le36\).

Step 3

Exam Tip

जड़ों का गुणनफल \(\frac{k}{k}=1\) है, इसलिए \(k\neq0\) चाहिए। वास्तविक जड़ों के लिए \(144-4k^2\ge0\), अतः \(k^2\le36\)।

Open Question Page
Ask Friends

यदि (x-2-2(a+3)x+a-2+6a+5=0) की जड़ें \(\alpha,\beta\) हैं, तो \(\alpha-\beta\) का धनात्मक मान क्या है?

If \(\alpha,\beta\) are the roots of (x-2-2(a+3)x+a-2+6a+5=0), what is the positive value of \(\alpha-\beta\)?

Explanation opens after your attempt
Correct Answer

A. (4)

Step 1

Concept

The equation becomes ((x-(a+1))(x-(a+5))=0). So the roots are (a+1) and (a+5), hence the positive difference is (4).

Step 2

Why this answer is correct

The correct answer is A. (4). The equation becomes ((x-(a+1))(x-(a+5))=0). So the roots are (a+1) and (a+5), hence the positive difference is (4).

Step 3

Exam Tip

यहाँ समीकरण ((x-(a+1))(x-(a+5))=0) बनता है। इसलिए जड़ें (a+1) और (a+5) हैं, अतः धनात्मक अंतर (4) है।

Open Question Page
Ask Friends

यदि \(x^2-12x+m=0\) की दोनों जड़ें अभाज्य संख्याएँ हैं, तो (m) का मान क्या है?

If both roots of \(x^2-12x+m=0\) are prime numbers, what is the value of (m)?

Explanation opens after your attempt
Correct Answer

B. (35)

Step 1

Concept

The prime roots with sum (12) are (5) and (7). Their product is (35), so (m=35).

Step 2

Why this answer is correct

The correct answer is B. (35). The prime roots with sum (12) are (5) and (7). Their product is (35), so (m=35).

Step 3

Exam Tip

योग (12) वाली अभाज्य जड़ें (5) और (7) हैं। उनका गुणनफल (35) है, इसलिए (m=35)।

Open Question Page
Ask Friends

यदि \(kx^2-10x+k=0\) की जड़ें वास्तविक और व्युत्क्रम हैं, तो (k) पर सही शर्त कौन-सी है?

If \(kx^2-10x+k=0\) has real reciprocal roots, which condition on (k) is correct?

Explanation opens after your attempt
Correct Answer

C. \(k\neq0\) और \(k^2\le25\)\(k\neq0\) and \(k^2\le25\)

Step 1

Concept

The product of roots is \(\frac{k}{k}=1\), so \(k\neq0\) is needed. For real roots, \(100-4k^2\ge0\), hence \(k^2\le25\).

Step 2

Why this answer is correct

The correct answer is C. \(k\neq0\) और \(k^2\le25\) / \(k\neq0\) and \(k^2\le25\). The product of roots is \(\frac{k}{k}=1\), so \(k\neq0\) is needed. For real roots, \(100-4k^2\ge0\), hence \(k^2\le25\).

Step 3

Exam Tip

जड़ों का गुणनफल \(\frac{k}{k}=1\) है, इसलिए \(k\neq0\) चाहिए। वास्तविक जड़ों के लिए \(100-4k^2\ge0\), अतः \(k^2\le25\)।

Open Question Page
Ask Friends

यदि (x-2-(2r+5)x+\(r^2+5r+6\)=0) की जड़ें \(\alpha,\beta\) हैं, तो \(\alpha-\beta\) का धनात्मक मान क्या है?

If \(\alpha,\beta\) are the roots of (x-2-(2r+5)x+\(r^2+5r+6\)=0), what is the positive value of \(\alpha-\beta\)?

Explanation opens after your attempt
Correct Answer

A. (1)

Step 1

Concept

In the given equation, the sum of roots is (2r+5) and the product is (r-2+5r+6=(r+2)(r+3)). Hence the roots are (r+2) and (r+3), so the positive difference is (1).

Step 2

Why this answer is correct

The correct answer is A. (1). In the given equation, the sum of roots is (2r+5) and the product is (r-2+5r+6=(r+2)(r+3)). Hence the roots are (r+2) and (r+3), so the positive difference is (1).

Step 3

Exam Tip

दिए गए समीकरण में जड़ों का योग (2r+5) और गुणनफल (r-2+5r+6=(r+2)(r+3)) है। इसलिए जड़ें (r+2) और (r+3) हैं, अतः धनात्मक अंतर (1) है।

Open Question Page
Ask Friends

यदि \(kx^2-8x+k=0\) की जड़ें वास्तविक और व्युत्क्रम हैं, तो (k) पर सही शर्त क्या है?

If the roots of \(kx^2-8x+k=0\) are real and reciprocal, what is the correct condition on (k)?

Explanation opens after your attempt
Correct Answer

A. \(k\neq0\) और \(k^2\le16\)\(k\neq0\) and \(k^2\le16\)

Step 1

Concept

For reciprocal roots, \(\frac{k}{k}=1\), so \(k\neq0\) is needed. For real roots, \(64-4k^2\ge0\), hence \(k^2\le16\).

Step 2

Why this answer is correct

The correct answer is A. \(k\neq0\) और \(k^2\le16\) / \(k\neq0\) and \(k^2\le16\). For reciprocal roots, \(\frac{k}{k}=1\), so \(k\neq0\) is needed. For real roots, \(64-4k^2\ge0\), hence \(k^2\le16\).

Step 3

Exam Tip

व्युत्क्रम जड़ों के लिए \(\frac{k}{k}=1\) है, इसलिए \(k\neq0\) चाहिए। वास्तविक जड़ों के लिए \(64-4k^2\ge0\), अतः \(k^2\le16\)।

Open Question Page
Ask Friends

\(x^2-10x+k=0\) की जड़ें भिन्न अभाज्य संख्याएँ हैं, तो (k) का मान क्या है?

The roots of \(x^2-10x+k=0\) are distinct prime numbers. What is (k)?

Explanation opens after your attempt
Correct Answer

A. (21)

Step 1

Concept

The distinct prime roots with sum (10) are (3) and (7). Their product is (21), so (k=21).

Step 2

Why this answer is correct

The correct answer is A. (21). The distinct prime roots with sum (10) are (3) and (7). Their product is (21), so (k=21).

Step 3

Exam Tip

योग (10) वाली भिन्न अभाज्य जड़ें (3) और (7) हैं। उनका गुणनफल (21) है, इसलिए (k=21)।

Open Question Page
Ask Friends

\(x^2-4x+k=0\) की जड़ें वास्तविक और व्युत्क्रम हों, तो (k) का मान क्या है?

If the roots of \(x^2-4x+k=0\) are real and reciprocal, what is (k)?

Explanation opens after your attempt
Correct Answer

A. (1)

Step 1

Concept

For reciprocal roots, \(\alpha\beta=1\). Here \(\alpha\beta=k\), so (k=1), and (D=12>0) confirms real roots.

Step 2

Why this answer is correct

The correct answer is A. (1). For reciprocal roots, \(\alpha\beta=1\). Here \(\alpha\beta=k\), so (k=1), and (D=12>0) confirms real roots.

Step 3

Exam Tip

व्युत्क्रम जड़ों के लिए \(\alpha\beta=1\) होता है। यहाँ \(\alpha\beta=k\), इसलिए (k=1), और (D=12>0) से जड़ें वास्तविक भी हैं।

Open Question Page
Ask Friends

यदि \(x^2+bx+c=0\) की जड़ें एक-दूसरे की विपरीत संख्याएँ हैं, तो कौन-सी शर्त अनिवार्य है?

If the roots of \(x^2+bx+c=0\) are opposites of each other, which condition is necessary?

Explanation opens after your attempt
Correct Answer

A. (b=0)

Step 1

Concept

Opposite roots have sum (0). Here the sum is (-b), so (b=0).

Step 2

Why this answer is correct

The correct answer is A. (b=0). Opposite roots have sum (0). Here the sum is (-b), so (b=0).

Step 3

Exam Tip

विपरीत जड़ों का योग (0) होता है। यहाँ योग (-b) है, इसलिए (b=0)।

Open Question Page
Ask Friends

\(x^2-px+36=0\) की जड़ें धनात्मक पूर्णांक हैं और उनका अंतर (5) है, तो (p) का मान क्या है?

The roots of \(x^2-px+36=0\) are positive integers and their difference is (5). What is (p)?

Explanation opens after your attempt
Correct Answer

C. (13)

Step 1

Concept

The positive roots with product (36) and difference (5) are (4) and (9). Their sum is (13), so (p=13).

Step 2

Why this answer is correct

The correct answer is C. (13). The positive roots with product (36) and difference (5) are (4) and (9). Their sum is (13), so (p=13).

Step 3

Exam Tip

गुणनफल (36) और अंतर (5) वाली धनात्मक जड़ें (4) और (9) हैं। उनका योग (13) है, इसलिए (p=13)।

Open Question Page
Ask Friends

यदि \(x^2-7x+k=0\) की जड़ें एक-दूसरे की व्युत्क्रम हैं, तो (k) का मान क्या होगा?

If the roots of \(x^2-7x+k=0\) are reciprocals of each other, what is the value of (k)?

Explanation opens after your attempt
Correct Answer

A. (1)

Step 1

Concept

For reciprocal roots, the product is (1), and here the product is (k). Hence (k=1); in exams, check the product first.

Step 2

Why this answer is correct

The correct answer is A. (1). For reciprocal roots, the product is (1), and here the product is (k). Hence (k=1); in exams, check the product first.

Step 3

Exam Tip

व्युत्क्रम जड़ों के लिए गुणनफल (1) होता है और यहाँ गुणनफल (k) है। इसलिए (k=1); परीक्षा में पहले गुणनफल देखें।

Open Question Page
Ask Friends

यदि \(4x^2-3x+k=0\) के मूलों का गुणनफल मूलों के योग के बराबर है तो (k) क्या होगा?

If the product of roots of \(4x^2-3x+k=0\) equals the sum of roots, what is (k)?

Explanation opens after your attempt
Correct Answer

A. (3)

Step 1

Concept

The sum is \(-\frac{b}{a}=\frac{3}{4}\) and the product is \(\frac{k}{4}\). From \(\frac{k}{4}=\frac{3}{4}\), (k=3).

Step 2

Why this answer is correct

The correct answer is A. (3). The sum is \(-\frac{b}{a}=\frac{3}{4}\) and the product is \(\frac{k}{4}\). From \(\frac{k}{4}=\frac{3}{4}\), (k=3).

Step 3

Exam Tip

योग \(-\frac{b}{a}=\frac{3}{4}\) और गुणनफल \(\frac{k}{4}\) है। \(\frac{k}{4}=\frac{3}{4}\) से (k=3) है।

Open Question Page
Ask Friends

यदि मूलों का योग (6) और उनके वर्गों का योग (52) है तो मूलों का गुणनफल क्या होगा?

If the sum of roots is (6) and the sum of their squares is (52), what is the product of roots?

Explanation opens after your attempt
Correct Answer

A. (-8)

Step 1

Concept

(\alpha-2+\beta-2=\(\alpha+\beta\)2-2\alpha\beta). From \(52=36-2\alpha\beta\), we get \(\alpha\beta=-8\).

Step 2

Why this answer is correct

The correct answer is A. (-8). (\alpha-2+\beta-2=\(\alpha+\beta\)2-2\alpha\beta). From \(52=36-2\alpha\beta\), we get \(\alpha\beta=-8\).

Step 3

Exam Tip

(\alpha-2+\beta-2=\(\alpha+\beta\)2-2\alpha\beta) है। \(52=36-2\alpha\beta\) से \(\alpha\beta=-8\) मिलता है।

Open Question Page
Ask Friends

यदि \(x^2-4x+3=0\) के मूल \(\alpha\) और \(\beta\) हैं तो \(3\alpha\) और \(3\beta\) को मूल मानकर समीकरण कौन सा होगा?

If \(\alpha\) and \(\beta\) are roots of \(x^2-4x+3=0\), which equation has \(3\alpha\) and \(3\beta\) as roots?

Explanation opens after your attempt
Correct Answer

A. \(x^2-12x+27=0\)

Step 1

Concept

The old sum is (4) and product is (3). The new sum is (12) and product is (27), so the equation is \(x^2-12x+27=0\).

Step 2

Why this answer is correct

The correct answer is A. \(x^2-12x+27=0\). The old sum is (4) and product is (3). The new sum is (12) and product is (27), so the equation is \(x^2-12x+27=0\).

Step 3

Exam Tip

पुराने योग (4) और गुणनफल (3) हैं। नए योग (12) और गुणनफल (27) होंगे इसलिए \(x^2-12x+27=0\) है।

Open Question Page
Ask Friends

यदि \(3x^2-2x+k=0\) के मूलों का गुणनफल मूलों के योग के बराबर है तो (k) क्या होगा?

If the product of roots of \(3x^2-2x+k=0\) equals the sum of roots, what is (k)?

Explanation opens after your attempt
Correct Answer

A. (2)

Step 1

Concept

The sum is \(-\frac{b}{a}=\frac{2}{3}\) and the product is \(\frac{k}{3}\). From \(\frac{k}{3}=\frac{2}{3}\), (k=2).

Step 2

Why this answer is correct

The correct answer is A. (2). The sum is \(-\frac{b}{a}=\frac{2}{3}\) and the product is \(\frac{k}{3}\). From \(\frac{k}{3}=\frac{2}{3}\), (k=2).

Step 3

Exam Tip

योग \(-\frac{b}{a}=\frac{2}{3}\) और गुणनफल \(\frac{k}{3}\) है। \(\frac{k}{3}=\frac{2}{3}\) से (k=2) है।

Open Question Page
Ask Friends

यदि मूलों का योग (4) और उनके वर्गों का योग (20) है तो मूलों का गुणनफल क्या होगा?

If the sum of roots is (4) and the sum of their squares is (20), what is the product of roots?

Explanation opens after your attempt
Correct Answer

A. (-2)

Step 1

Concept

(\alpha-2+\beta-2=\(\alpha+\beta\)2-2\alpha\beta). From \(20=16-2\alpha\beta\), we get \(\alpha\beta=-2\).

Step 2

Why this answer is correct

The correct answer is A. (-2). (\alpha-2+\beta-2=\(\alpha+\beta\)2-2\alpha\beta). From \(20=16-2\alpha\beta\), we get \(\alpha\beta=-2\).

Step 3

Exam Tip

(\alpha-2+\beta-2=\(\alpha+\beta\)2-2\alpha\beta) है। \(20=16-2\alpha\beta\) से \(\alpha\beta=-2\) मिलता है।

Open Question Page
Ask Friends

यदि \(x^2-3x+2=0\) के मूल \(\alpha\) और \(\beta\) हैं तो \(2\alpha\) और \(2\beta\) को मूल मानकर समीकरण कौन सा होगा?

If \(\alpha\) and \(\beta\) are roots of \(x^2-3x+2=0\), which equation has \(2\alpha\) and \(2\beta\) as roots?

Explanation opens after your attempt
Correct Answer

A. \(x^2-6x+8=0\)

Step 1

Concept

The old sum is (3) and product is (2). The new sum is (6) and product is (8), so the equation is \(x^2-6x+8=0\).

Step 2

Why this answer is correct

The correct answer is A. \(x^2-6x+8=0\). The old sum is (3) and product is (2). The new sum is (6) and product is (8), so the equation is \(x^2-6x+8=0\).

Step 3

Exam Tip

पुराने योग (3) और गुणनफल (2) हैं। नए योग (6) और गुणनफल (8) होंगे इसलिए \(x^2-6x+8=0\) है।

Open Question Page
Ask Friends

यदि किसी द्विघात समीकरण के मूलों का योग (0) है तो मूलों के बारे में सही कथन कौन सा हो सकता है?

If the sum of roots of a quadratic equation is (0), which statement about the roots can be correct?

Explanation opens after your attempt
Correct Answer

A. मूल एक दूसरे के विपरीत हैंThe roots are opposites of each other

Step 1

Concept

If \(\alpha+\beta=0\), then \(\beta=-\alpha\). Therefore the roots can be opposites.

Step 2

Why this answer is correct

The correct answer is A. मूल एक दूसरे के विपरीत हैं / The roots are opposites of each other. If \(\alpha+\beta=0\), then \(\beta=-\alpha\). Therefore the roots can be opposites.

Step 3

Exam Tip

यदि \(\alpha+\beta=0\) है तो \(\beta=-\alpha\) होता है। इसलिए मूल विपरीत हो सकते हैं।

Open Question Page
Ask Friends

यदि \(4\alpha\) और \(4\beta\) नए मूल हैं तथा \(\alpha+\beta=3\) है तो नए मूलों का योग क्या होगा?

If \(4\alpha\) and \(4\beta\) are new roots and \(\alpha+\beta=3\), what is the sum of the new roots?

Explanation opens after your attempt
Correct Answer

A. (12)

Step 1

Concept

The sum of new roots is (4\alpha+4\beta=4\(\alpha+\beta\)=12). When roots are multiplied by a factor, the sum is also multiplied by that factor.

Step 2

Why this answer is correct

The correct answer is A. (12). The sum of new roots is (4\alpha+4\beta=4\(\alpha+\beta\)=12). When roots are multiplied by a factor, the sum is also multiplied by that factor.

Step 3

Exam Tip

नए मूलों का योग (4\alpha+4\beta=4\(\alpha+\beta\)=12) है। गुणक लगे मूलों में योग भी उसी गुणक से गुणा होता है।

Open Question Page
Ask Friends

यदि \(3\alpha\) और \(3\beta\) नए मूल हैं तथा \(\alpha+\beta=4\) है तो नए मूलों का योग क्या होगा?

If \(3\alpha\) and \(3\beta\) are new roots and \(\alpha+\beta=4\), what is the sum of the new roots?

Explanation opens after your attempt
Correct Answer

A. (12)

Step 1

Concept

The sum of new roots is (3\alpha+3\beta=3\(\alpha+\beta\)=12). When roots are multiplied by a factor, the sum is multiplied by the same factor.

Step 2

Why this answer is correct

The correct answer is A. (12). The sum of new roots is (3\alpha+3\beta=3\(\alpha+\beta\)=12). When roots are multiplied by a factor, the sum is multiplied by the same factor.

Step 3

Exam Tip

नए मूलों का योग (3\alpha+3\beta=3\(\alpha+\beta\)=12) है। गुणक लगे मूलों में योग पर भी वही गुणक लगता है।

Open Question Page
Ask Friends

यदि \(2\alpha\) और \(2\beta\) मूल हैं तथा \(\alpha+\beta=5\) है तो नए मूलों का योग क्या होगा?

If \(2\alpha\) and \(2\beta\) are roots and \(\alpha+\beta=5\), what is the sum of the new roots?

Explanation opens after your attempt
Correct Answer

A. (10)

Step 1

Concept

The sum of new roots is (2\alpha+2\beta=2\(\alpha+\beta\)=10). When roots are multiplied by a factor, the sum is also multiplied by that factor.

Step 2

Why this answer is correct

The correct answer is A. (10). The sum of new roots is (2\alpha+2\beta=2\(\alpha+\beta\)=10). When roots are multiplied by a factor, the sum is also multiplied by that factor.

Step 3

Exam Tip

नए मूलों का योग (2\alpha+2\beta=2\(\alpha+\beta\)=10) है। गुणक लगे मूलों में योग पर भी वही गुणक लगता है।

Open Question Page
Ask Friends

जिस मोनिक द्विघात समीकरण के मूलों का योग (10) और गुणनफल (21) है वह कौन सा है?

Which monic quadratic equation has sum of roots (10) and product of roots (21)?

Explanation opens after your attempt
Correct Answer

B. \(x^2-10x+21=0\)

Step 1

Concept

\(A monic equation is (x^2-(\)sum)x+product\(=0). Therefore (x^2-10x+21=0) is correct.\)

Step 2

Why this answer is correct

\(The correct answer is B. (x^2-10x+21=0). A monic equation is (x^2-(\)sum)x+product\(=0). Therefore (x^2-10x+21=0) is correct.\)

Step 3

Exam Tip

\(मोनिक समीकरण (x^2-(\)योग)x+गुणनफल=0) होता है। \(इसलिए (x^2-10x+21=0) सही है\)।

Open Question Page
Ask Friends

यदि दो वास्तविक मूलों का गुणनफल धनात्मक और योग धनात्मक है तो दोनों मूल कैसे होंगे?

If the product of two real roots is positive and their sum is positive, how will both roots be?

Explanation opens after your attempt
Correct Answer

A. दोनों धनात्मकBoth positive

Step 1

Concept

A positive product means both signs are same. A positive sum means both roots are positive.

Step 2

Why this answer is correct

The correct answer is A. दोनों धनात्मक / Both positive. A positive product means both signs are same. A positive sum means both roots are positive.

Step 3

Exam Tip

गुणनफल धनात्मक होने पर दोनों चिन्ह समान होते हैं। योग धनात्मक होने से दोनों मूल धनात्मक होंगे।

Open Question Page
Ask Friends

जिस मोनिक द्विघात समीकरण के मूलों का योग (-9) और गुणनफल (20) है वह कौन सा है?

Which monic quadratic equation has sum of roots (-9) and product of roots (20)?

Explanation opens after your attempt
Correct Answer

A. \(x^2+9x+20=0\)

Step 1

Concept

\(A monic equation is (x^2-(\)sum)x+product\(=0). Therefore (x^2+9x+20=0) is correct.\)

Step 2

Why this answer is correct

\(The correct answer is A. (x^2+9x+20=0). A monic equation is (x^2-(\)sum)x+product\(=0). Therefore (x^2+9x+20=0) is correct.\)

Step 3

Exam Tip

\(मोनिक समीकरण (x^2-(\)योग)x+गुणनफल=0) होता है। \(इसलिए (x^2+9x+20=0) सही है\)।

Open Question Page
Ask Friends

यदि दो वास्तविक मूलों का गुणनफल धनात्मक और योग ऋणात्मक है तो दोनों मूल कैसे होंगे?

If the product of two real roots is positive and their sum is negative, how will both roots be?

Explanation opens after your attempt
Correct Answer

B. दोनों ऋणात्मकBoth negative

Step 1

Concept

A positive product means both roots have the same sign. A negative sum means both roots are negative.

Step 2

Why this answer is correct

The correct answer is B. दोनों ऋणात्मक / Both negative. A positive product means both roots have the same sign. A negative sum means both roots are negative.

Step 3

Exam Tip

गुणनफल धनात्मक होने पर दोनों मूलों का चिन्ह समान होता है। योग ऋणात्मक होने से दोनों मूल ऋणात्मक होंगे।

Open Question Page
Ask Friends

जिस द्विघात समीकरण के मूलों का योग (6) और गुणनफल (8) है वह कौन सा है?

Which quadratic equation has sum of roots (6) and product of roots (8)?

Explanation opens after your attempt
Correct Answer

B. \(x^2-6x+8=0\)

Step 1

Concept

\(The standard form is (x^2-(\)sum)x+product\(=0) so (x^2-6x+8=0). The sign of the sum term changes.\)

Step 2

Why this answer is correct

\(The correct answer is B. (x^2-6x+8=0). The standard form is (x^2-(\)sum)x+product\(=0) so (x^2-6x+8=0). The sign of the sum term changes.\)

Step 3

Exam Tip

\(मानक रूप (x^2-(\)योग)x+गुणनफल=0) है इसलिए \(x^2-6x+8=0\)। योग वाले पद का चिन्ह बदलता है।

Open Question Page
Ask Friends

यदि ((m+4)x-2-2(m+2)x+m=0) में \(m\neq-4\) हो, तो मूलों की प्रकृति क्या होगी?

If \(m\neq-4\) in ((m+4)x-2-2(m+2)x+m=0), what will be the nature of roots?

Explanation opens after your attempt
Correct Answer

A. दो वास्तविक और असमानTwo real and distinct

Step 1

Concept

Here (D=4(m+2)2-4m(m+4)=16). Since (D>0), two distinct real roots are obtained.

Step 2

Why this answer is correct

The correct answer is A. दो वास्तविक और असमान / Two real and distinct. Here (D=4(m+2)2-4m(m+4)=16). Since (D>0), two distinct real roots are obtained.

Step 3

Exam Tip

यहाँ (D=4(m+2)2-4m(m+4)=16) है। (D>0) होने से दो असमान वास्तविक मूल मिलते हैं।

Open Question Page
Ask Friends

यदि (x-2-(2a+5)x+(a+2)(a+3)=0) है, तो मूलों की प्रकृति क्या होगी?

If (x-2-(2a+5)x+(a+2)(a+3)=0), what will be the nature of roots?

Explanation opens after your attempt
Correct Answer

A. दो वास्तविक परिमेय और असमान ((D=1))Two real rational and distinct ((D=1))

Step 1

Concept

Here (D=(2a+5)2-4(a+2)(a+3)=1). Thus for every (a), roots are rational and distinct.

Step 2

Why this answer is correct

The correct answer is A. दो वास्तविक परिमेय और असमान ((D=1)) / Two real rational and distinct ((D=1)). Here (D=(2a+5)2-4(a+2)(a+3)=1). Thus for every (a), roots are rational and distinct.

Step 3

Exam Tip

यहाँ (D=(2a+5)2-4(a+2)(a+3)=1) है। इसलिए हर (a) पर मूल परिमेय और असमान हैं।

Open Question Page
Ask Friends

यदि (x-2-2rx+\(r^2-81\)=0) हो, तो (r) के किसी भी वास्तविक मान के लिए मूलों की प्रकृति क्या होगी?

If (x-2-2rx+\(r^2-81\)=0), what is the nature of roots for any real value of (r)?

Explanation opens after your attempt
Correct Answer

A. दो वास्तविक परिमेय और असमानTwo real rational and distinct

Step 1

Concept

Here (D=4r-2-4\(r^2-81\)=324). A positive perfect-square (D) gives rational distinct roots.

Step 2

Why this answer is correct

The correct answer is A. दो वास्तविक परिमेय और असमान / Two real rational and distinct. Here (D=4r-2-4\(r^2-81\)=324). A positive perfect-square (D) gives rational distinct roots.

Step 3

Exam Tip

यहाँ (D=4r-2-4\(r^2-81\)=324) है। धनात्मक पूर्ण वर्ग (D) परिमेय असमान मूल देता है।

Open Question Page
Ask Friends

समीकरण (x-2-2\(3+\sqrt{5}\)x+\(14+6\sqrt{5}\)=0) के मूलों की प्रकृति क्या होगी?

What will be the nature of roots of (x-2-2\(3+\sqrt{5}\)x+\(14+6\sqrt{5}\)=0)?

Explanation opens after your attempt
Correct Answer

A. दो वास्तविक और समानTwo real and equal

Step 1

Concept

Here (D=4\(3+\sqrt{5}\)2-4\(14+6\sqrt{5}\)=0). Hence the roots are equal.

Step 2

Why this answer is correct

The correct answer is A. दो वास्तविक और समान / Two real and equal. Here (D=4\(3+\sqrt{5}\)2-4\(14+6\sqrt{5}\)=0). Hence the roots are equal.

Step 3

Exam Tip

यहाँ (D=4\(3+\sqrt{5}\)2-4\(14+6\sqrt{5}\)=0) है। अतः मूल समान हैं।

Open Question Page
Ask Friends

समीकरण (x-2+2\(3-\sqrt{10}\)x+16=0) के मूलों की प्रकृति क्या है?

What is the nature of roots of (x-2+2\(3-\sqrt{10}\)x+16=0)?

Explanation opens after your attempt
Correct Answer

A. कोई वास्तविक मूल नहींNo real roots

Step 1

Concept

Here (D=4\(3-\sqrt{10}\)2-64), which is negative. So there are no real roots.

Step 2

Why this answer is correct

The correct answer is A. कोई वास्तविक मूल नहीं / No real roots. Here (D=4\(3-\sqrt{10}\)2-64), which is negative. So there are no real roots.

Step 3

Exam Tip

यहाँ (D=4\(3-\sqrt{10}\)2-64) है जो ऋणात्मक है। इसलिए वास्तविक मूल नहीं हैं।

Open Question Page
Ask Friends

यदि (x-2-2px+\(p^2-64\)=0) हो, तो (p) के किसी भी वास्तविक मान के लिए मूलों की प्रकृति क्या होगी?

If (x-2-2px+\(p^2-64\)=0), what is the nature of roots for any real value of (p)?

Explanation opens after your attempt
Correct Answer

A. दो वास्तविक परिमेय और असमानTwo real rational and distinct

Step 1

Concept

Here (D=4p-2-4\(p^2-64\)=256). A positive perfect-square discriminant gives rational distinct roots.

Step 2

Why this answer is correct

The correct answer is A. दो वास्तविक परिमेय और असमान / Two real rational and distinct. Here (D=4p-2-4\(p^2-64\)=256). A positive perfect-square discriminant gives rational distinct roots.

Step 3

Exam Tip

यहाँ (D=4p-2-4\(p^2-64\)=256) है। धनात्मक पूर्ण वर्ग विविक्तकर परिमेय असमान मूल देता है।

Open Question Page
Ask Friends

समीकरण \(8x^2-4\sqrt{10}x+5=0\) में मूलों की प्रकृति क्या है?

What is the nature of roots in \(8x^2-4\sqrt{10}x+5=0\)?

Explanation opens after your attempt
Correct Answer

A. दो वास्तविक और समान ((D=0))Two real and equal ((D=0))

Step 1

Concept

Here (D=\(-4\sqrt{10}\)2-4(8)(5)=160-160=0). (D=0) gives equal roots.

Step 2

Why this answer is correct

The correct answer is A. दो वास्तविक और समान ((D=0)) / Two real and equal ((D=0)). Here (D=\(-4\sqrt{10}\)2-4(8)(5)=160-160=0). (D=0) gives equal roots.

Step 3

Exam Tip

यहाँ (D=\(-4\sqrt{10}\)2-4(8)(5)=160-160=0) है। (D=0) से समान मूल मिलते हैं।

Open Question Page
Ask Friends

यदि (a<0), (c<0) और (b=0), तो \(ax^2+c=0\) के मूलों की प्रकृति क्या होगी?

If (a<0), (c<0), and (b=0), what will be the nature of roots of \(ax^2+c=0\)?

Explanation opens after your attempt
Correct Answer

A. कोई वास्तविक मूल नहींNo real roots

Step 1

Concept

Here (ac>0), so \(D=0^2-4ac<0\). Therefore real roots will not exist.

Step 2

Why this answer is correct

The correct answer is A. कोई वास्तविक मूल नहीं / No real roots. Here (ac>0), so \(D=0^2-4ac<0\). Therefore real roots will not exist.

Step 3

Exam Tip

यहाँ (ac>0), इसलिए \(D=0^2-4ac<0\) है। इसलिए वास्तविक मूल नहीं होंगे।

Open Question Page
Ask Friends

यदि (a<0), (c>0) और (b) कोई वास्तविक संख्या हो, तो \(ax^2+bx+c=0\) के मूलों की प्रकृति क्या होगी?

If (a<0), (c>0), and (b) is any real number, what will be the nature of roots of \(ax^2+bx+c=0\)?

Explanation opens after your attempt
Correct Answer

A. दो वास्तविक और असमानTwo real and distinct

Step 1

Concept

Here (ac<0), so (-4ac>0) and \(D=b^2-4ac>0\). Hence there will be two distinct real roots.

Step 2

Why this answer is correct

The correct answer is A. दो वास्तविक और असमान / Two real and distinct. Here (ac<0), so (-4ac>0) and \(D=b^2-4ac>0\). Hence there will be two distinct real roots.

Step 3

Exam Tip

यहाँ (ac<0), इसलिए (-4ac>0) और \(D=b^2-4ac>0\) है। अतः दो असमान वास्तविक मूल होंगे।

Open Question Page
Ask Friends

समीकरण \(3x^2-2\sqrt{21}x+7=0\) के मूलों की प्रकृति क्या होगी?

What will be the nature of roots of \(3x^2-2\sqrt{21}x+7=0\)?

Explanation opens after your attempt
Correct Answer

A. दो वास्तविक और समान ((D=0))Two real and equal ((D=0))

Step 1

Concept

Here (D=\(-2\sqrt{21}\)2-4(3)(7)=84-84=0). Therefore both roots are equal.

Step 2

Why this answer is correct

The correct answer is A. दो वास्तविक और समान ((D=0)) / Two real and equal ((D=0)). Here (D=\(-2\sqrt{21}\)2-4(3)(7)=84-84=0). Therefore both roots are equal.

Step 3

Exam Tip

यहाँ (D=\(-2\sqrt{21}\)2-4(3)(7)=84-84=0) है। इसलिए दोनों मूल समान हैं।

Open Question Page
Ask Friends

समीकरण \(6x^2-4\sqrt{6}x+4=0\) के मूलों की प्रकृति क्या है?

What is the nature of roots of \(6x^2-4\sqrt{6}x+4=0\)?

Explanation opens after your attempt
Correct Answer

A. दो वास्तविक और समान ((D=0))Two real and equal ((D=0))

Step 1

Concept

Here (D=\(-4\sqrt{6}\)2-4(6)(4)=96-96=0). (D=0) indicates equal roots.

Step 2

Why this answer is correct

The correct answer is A. दो वास्तविक और समान ((D=0)) / Two real and equal ((D=0)). Here (D=\(-4\sqrt{6}\)2-4(6)(4)=96-96=0). (D=0) indicates equal roots.

Step 3

Exam Tip

यहाँ (D=\(-4\sqrt{6}\)2-4(6)(4)=96-96=0) है। (D=0) समान मूलों का संकेत है।

Open Question Page
Ask Friends

समीकरण (x-2-2\(1+\sqrt{5}\)x+\(6+2\sqrt{5}\)=0) के मूलों की प्रकृति क्या है?

What is the nature of roots of (x-2-2\(1+\sqrt{5}\)x+\(6+2\sqrt{5}\)=0)?

Explanation opens after your attempt
Correct Answer

A. दो वास्तविक और समान ((D=0))Two real and equal ((D=0))

Step 1

Concept

Here (D=4\(1+\sqrt{5}\)2-4\(6+2\sqrt{5}\)=0). Therefore both roots are equal real roots.

Step 2

Why this answer is correct

The correct answer is A. दो वास्तविक और समान ((D=0)) / Two real and equal ((D=0)). Here (D=4\(1+\sqrt{5}\)2-4\(6+2\sqrt{5}\)=0). Therefore both roots are equal real roots.

Step 3

Exam Tip

यहाँ (D=4\(1+\sqrt{5}\)2-4\(6+2\sqrt{5}\)=0) है। इसलिए दोनों मूल समान वास्तविक हैं।

Open Question Page
Ask Friends

यदि ((m+3)x-2-2(m+1)x+(m-1)=0) में \(m\neq-3\) हो, तो मूलों की प्रकृति क्या होगी?

If \(m\neq-3\) in ((m+3)x-2-2(m+1)x+(m-1)=0), what will be the nature of roots?

Explanation opens after your attempt
Correct Answer

A. दो वास्तविक और असमानTwo real and distinct

Step 1

Concept

Here (D=4(m+1)2-4(m+3)(m-1)=16). Since (D>0), two distinct real roots are obtained.

Step 2

Why this answer is correct

The correct answer is A. दो वास्तविक और असमान / Two real and distinct. Here (D=4(m+1)2-4(m+3)(m-1)=16). Since (D>0), two distinct real roots are obtained.

Step 3

Exam Tip

यहाँ (D=4(m+1)2-4(m+3)(m-1)=16) है। (D>0) होने से दो असमान वास्तविक मूल मिलते हैं।

Open Question Page
Ask Friends

यदि (x-2-(2a+3)x+(a+1)(a+2)=0) है, तो मूलों की प्रकृति क्या होगी?

If (x-2-(2a+3)x+(a+1)(a+2)=0), what will be the nature of roots?

Explanation opens after your attempt
Correct Answer

A. दो वास्तविक परिमेय और असमान ((D=1))Two real rational and distinct ((D=1))

Step 1

Concept

Here (D=(2a+3)2-4(a+1)(a+2)=1). Thus for every (a), roots are rational and distinct.

Step 2

Why this answer is correct

The correct answer is A. दो वास्तविक परिमेय और असमान ((D=1)) / Two real rational and distinct ((D=1)). Here (D=(2a+3)2-4(a+1)(a+2)=1). Thus for every (a), roots are rational and distinct.

Step 3

Exam Tip

यहाँ (D=(2a+3)2-4(a+1)(a+2)=1) है। इसलिए हर (a) पर मूल परिमेय और असमान हैं।

Open Question Page
Ask Friends

यदि (x-2-2rx+\(r^2-49\)=0) हो, तो (r) के किसी भी वास्तविक मान के लिए मूलों की प्रकृति क्या होगी?

If (x-2-2rx+\(r^2-49\)=0), what is the nature of roots for any real value of (r)?

Explanation opens after your attempt
Correct Answer

A. दो वास्तविक परिमेय और असमानTwo real rational and distinct

Step 1

Concept

Here (D=4r-2-4\(r^2-49\)=196). A positive perfect-square discriminant gives rational distinct roots.

Step 2

Why this answer is correct

The correct answer is A. दो वास्तविक परिमेय और असमान / Two real rational and distinct. Here (D=4r-2-4\(r^2-49\)=196). A positive perfect-square discriminant gives rational distinct roots.

Step 3

Exam Tip

यहाँ (D=4r-2-4\(r^2-49\)=196) है। धनात्मक पूर्ण वर्ग विविक्तकर परिमेय असमान मूल देता है।

Open Question Page
Ask Friends

समीकरण (x-2-2\(2+\sqrt{3}\)x+\(7+4\sqrt{3}\)=0) के मूलों की प्रकृति क्या होगी?

What will be the nature of roots of (x-2-2\(2+\sqrt{3}\)x+\(7+4\sqrt{3}\)=0)?

Explanation opens after your attempt
Correct Answer

A. दो वास्तविक और समानTwo real and equal

Step 1

Concept

Here (D=4\(2+\sqrt{3}\)2-4\(7+4\sqrt{3}\)=0). Hence the roots are equal.

Step 2

Why this answer is correct

The correct answer is A. दो वास्तविक और समान / Two real and equal. Here (D=4\(2+\sqrt{3}\)2-4\(7+4\sqrt{3}\)=0). Hence the roots are equal.

Step 3

Exam Tip

यहाँ (D=4\(2+\sqrt{3}\)2-4\(7+4\sqrt{3}\)=0) है। अतः मूल समान हैं।

Open Question Page
Ask Friends

समीकरण (x-2+2\(2-\sqrt{5}\)x+9=0) के मूलों की प्रकृति क्या है?

What is the nature of roots of (x-2+2\(2-\sqrt{5}\)x+9=0)?

Explanation opens after your attempt
Correct Answer

A. कोई वास्तविक मूल नहींNo real roots

Step 1

Concept

Here (D=4\(2-\sqrt{5}\)2-36), which is negative. So there are no real roots.

Step 2

Why this answer is correct

The correct answer is A. कोई वास्तविक मूल नहीं / No real roots. Here (D=4\(2-\sqrt{5}\)2-36), which is negative. So there are no real roots.

Step 3

Exam Tip

यहाँ (D=4\(2-\sqrt{5}\)2-36) है जो ऋणात्मक है। इसलिए वास्तविक मूल नहीं हैं।

Open Question Page
Ask Friends

यदि (x-2-2px+\(p^2-25\)=0) हो, तो (p) के किसी भी वास्तविक मान के लिए मूलों की प्रकृति क्या होगी?

If (x-2-2px+\(p^2-25\)=0), what is the nature of roots for any real value of (p)?

Explanation opens after your attempt
Correct Answer

A. दो वास्तविक परिमेय और असमानTwo real rational and distinct

Step 1

Concept

Here (D=4p-2-4\(p^2-25\)=100). (100) is a positive perfect square, so roots are rational and distinct.

Step 2

Why this answer is correct

The correct answer is A. दो वास्तविक परिमेय और असमान / Two real rational and distinct. Here (D=4p-2-4\(p^2-25\)=100). (100) is a positive perfect square, so roots are rational and distinct.

Step 3

Exam Tip

यहाँ (D=4p-2-4\(p^2-25\)=100) है। (100) धनात्मक पूर्ण वर्ग है, इसलिए मूल परिमेय और असमान हैं।

Open Question Page
Ask Friends

समीकरण \(7x^2-2\sqrt{21}x+3=0\) में मूलों की प्रकृति क्या है?

What is the nature of roots in \(7x^2-2\sqrt{21}x+3=0\)?

Explanation opens after your attempt
Correct Answer

A. दो वास्तविक और समान ((D=0))Two real and equal ((D=0))

Step 1

Concept

Here (D=\(-2\sqrt{21}\)2-4(7)(3)=84-84=0). (D=0) gives equal roots.

Step 2

Why this answer is correct

The correct answer is A. दो वास्तविक और समान ((D=0)) / Two real and equal ((D=0)). Here (D=\(-2\sqrt{21}\)2-4(7)(3)=84-84=0). (D=0) gives equal roots.

Step 3

Exam Tip

यहाँ (D=\(-2\sqrt{21}\)2-4(7)(3)=84-84=0) है। (D=0) से समान मूल मिलते हैं।

Open Question Page
Ask Friends

यदि (a>0), (c<0) और (b) कोई वास्तविक संख्या हो, तो \(ax^2+bx+c=0\) के मूलों की प्रकृति क्या होगी?

If (a>0), (c<0), and (b) is any real number, what will be the nature of roots of \(ax^2+bx+c=0\)?

Explanation opens after your attempt
Correct Answer

A. दो वास्तविक और असमानTwo real and distinct

Step 1

Concept

Here (ac<0), so (-4ac>0) and \(D=b^2-4ac>0\). Hence there will be two distinct real roots.

Step 2

Why this answer is correct

The correct answer is A. दो वास्तविक और असमान / Two real and distinct. Here (ac<0), so (-4ac>0) and \(D=b^2-4ac>0\). Hence there will be two distinct real roots.

Step 3

Exam Tip

यहाँ (ac<0), इसलिए (-4ac>0) और \(D=b^2-4ac>0\) है। अतः दो असमान वास्तविक मूल होंगे।

Open Question Page
Ask Friends

समीकरण \(5x^2-2\sqrt{30}x+6=0\) में मूलों की प्रकृति क्या होगी?

What will be the nature of roots in \(5x^2-2\sqrt{30}x+6=0\)?

Explanation opens after your attempt
Correct Answer

A. दो वास्तविक और समान ((D=0))Two real and equal ((D=0))

Step 1

Concept

Here (D=\(-2\sqrt{30}\)2-4(5)(6)=120-120=0). (D=0) indicates equal roots.

Step 2

Why this answer is correct

The correct answer is A. दो वास्तविक और समान ((D=0)) / Two real and equal ((D=0)). Here (D=\(-2\sqrt{30}\)2-4(5)(6)=120-120=0). (D=0) indicates equal roots.

Step 3

Exam Tip

यहाँ (D=\(-2\sqrt{30}\)2-4(5)(6)=120-120=0) है। (D=0) समान मूलों का संकेत है।

Open Question Page
Ask Friends

समीकरण \(2x^2-6\sqrt{2}x+9=0\) के मूलों की प्रकृति क्या है?

What is the nature of roots of \(2x^2-6\sqrt{2}x+9=0\)?

Explanation opens after your attempt
Correct Answer

A. दो वास्तविक और समान ((D=0))Two real and equal ((D=0))

Step 1

Concept

Here (D=\(-6\sqrt{2}\)2-4(2)(9)=72-72=0). Therefore both roots are equal.

Step 2

Why this answer is correct

The correct answer is A. दो वास्तविक और समान ((D=0)) / Two real and equal ((D=0)). Here (D=\(-6\sqrt{2}\)2-4(2)(9)=72-72=0). Therefore both roots are equal.

Step 3

Exam Tip

यहाँ (D=\(-6\sqrt{2}\)2-4(2)(9)=72-72=0) है। इसलिए दोनों मूल समान हैं।

Open Question Page
Ask Friends

यदि (x-2-(a+b)x+ab=0) और \(a\neq b\), तो मूलों की प्रकृति क्या होगी?

If (x-2-(a+b)x+ab=0) and \(a\neq b\), what will be the nature of roots?

Explanation opens after your attempt
Correct Answer

A. दो वास्तविक और असमानTwo real and distinct

Step 1

Concept

Here (D=(a+b)2-4ab=(a-b)2). Since \(a\neq b\), (D>0), so the roots are distinct real roots.

Step 2

Why this answer is correct

The correct answer is A. दो वास्तविक और असमान / Two real and distinct. Here (D=(a+b)2-4ab=(a-b)2). Since \(a\neq b\), (D>0), so the roots are distinct real roots.

Step 3

Exam Tip

यहाँ (D=(a+b)2-4ab=(a-b)2) है। \(a\neq b\) होने पर (D>0), इसलिए मूल असमान वास्तविक हैं।

Open Question Page
Ask Friends

यदि (x-2-(2a+1)x+a(a+1)=0) है, तो मूलों की प्रकृति क्या होगी?

If (x-2-(2a+1)x+a(a+1)=0), what will be the nature of roots?

Explanation opens after your attempt
Correct Answer

A. दो वास्तविक परिमेय और असमान ((D=1))Two real rational and distinct ((D=1))

Step 1

Concept

Here (D=(2a+1)2-4a(a+1)=1). Thus for every value of (a), the roots are rational and distinct.

Step 2

Why this answer is correct

The correct answer is A. दो वास्तविक परिमेय और असमान ((D=1)) / Two real rational and distinct ((D=1)). Here (D=(2a+1)2-4a(a+1)=1). Thus for every value of (a), the roots are rational and distinct.

Step 3

Exam Tip

यहाँ (D=(2a+1)2-4a(a+1)=1) है। इसलिए (a) के हर मान पर मूल परिमेय और असमान हैं।

Open Question Page
Ask Friends

यदि (x-2-2rx+\(r^2-16\)=0) हो, तो (r) के किसी भी वास्तविक मान के लिए मूलों की प्रकृति क्या होगी?

If (x-2-2rx+\(r^2-16\)=0), what is the nature of roots for any real value of (r)?

Explanation opens after your attempt
Correct Answer

A. दो वास्तविक परिमेय और असमानTwo real rational and distinct

Step 1

Concept

Here (D=4r-2-4\(r^2-16\)=64). (64) is a positive perfect square, so roots are rational and distinct.

Step 2

Why this answer is correct

The correct answer is A. दो वास्तविक परिमेय और असमान / Two real rational and distinct. Here (D=4r-2-4\(r^2-16\)=64). (64) is a positive perfect square, so roots are rational and distinct.

Step 3

Exam Tip

यहाँ (D=4r-2-4\(r^2-16\)=64) है। (64) धनात्मक पूर्ण वर्ग है, इसलिए मूल परिमेय और असमान हैं।

Open Question Page
Ask Friends

समीकरण (x-2-2\(3+\sqrt{2}\)x+\(17+12\sqrt{2}\)=0) के मूलों की प्रकृति क्या होगी?

What will be the nature of roots of (x-2-2\(3+\sqrt{2}\)x+\(17+12\sqrt{2}\)=0)?

Explanation opens after your attempt
Correct Answer

A. दो वास्तविक और समानTwo real and equal

Step 1

Concept

Here (D=4\(3+\sqrt{2}\)2-4\(17+12\sqrt{2}\)=0). (D=0) shows equal roots.

Step 2

Why this answer is correct

The correct answer is A. दो वास्तविक और समान / Two real and equal. Here (D=4\(3+\sqrt{2}\)2-4\(17+12\sqrt{2}\)=0). (D=0) shows equal roots.

Step 3

Exam Tip

यहाँ (D=4\(3+\sqrt{2}\)2-4\(17+12\sqrt{2}\)=0) है। (D=0) समान मूलों को दिखाता है।

Open Question Page
Ask Friends

समीकरण (x-2+2\(1-\sqrt{3}\)x+4=0) के मूलों की प्रकृति क्या है?

What is the nature of roots of (x-2+2\(1-\sqrt{3}\)x+4=0)?

Explanation opens after your attempt
Correct Answer

A. कोई वास्तविक मूल नहींNo real roots

Step 1

Concept

Here (D=4\(1-\sqrt{3}\)2-16=4\(4-2\sqrt{3}\)-16=-8\sqrt{3}<0). So there are no real roots.

Step 2

Why this answer is correct

The correct answer is A. कोई वास्तविक मूल नहीं / No real roots. Here (D=4\(1-\sqrt{3}\)2-16=4\(4-2\sqrt{3}\)-16=-8\sqrt{3}<0). So there are no real roots.

Step 3

Exam Tip

यहाँ (D=4\(1-\sqrt{3}\)2-16=4\(4-2\sqrt{3}\)-16=-8\sqrt{3}<0) है। इसलिए वास्तविक मूल नहीं हैं।

Open Question Page
Ask Friends

यदि समीकरण (x-2-2px+\(p^2-q^2\)=0) हो और \(q\neq0\), तो मूलों की प्रकृति क्या होगी?

If the equation is (x-2-2px+\(p^2-q^2\)=0) and \(q\neq0\), what will be the nature of roots?

Explanation opens after your attempt
Correct Answer

A. दो वास्तविक और असमानTwo real and distinct

Step 1

Concept

Here (D=4p-2-4\(p^2-q^2\)=4q-2>0). Therefore two distinct real roots will exist.

Step 2

Why this answer is correct

The correct answer is A. दो वास्तविक और असमान / Two real and distinct. Here (D=4p-2-4\(p^2-q^2\)=4q-2>0). Therefore two distinct real roots will exist.

Step 3

Exam Tip

यहाँ (D=4p-2-4\(p^2-q^2\)=4q-2>0) है। इसलिए दो असमान वास्तविक मूल मिलेंगे।

Open Question Page
Ask Friends

समीकरण \(3x^2-2\sqrt{6}x+2=0\) के मूलों की प्रकृति बताइए।

State the nature of roots of \(3x^2-2\sqrt{6}x+2=0\).

Explanation opens after your attempt
Correct Answer

A. दो वास्तविक और समान ((D=0))Two real and equal ((D=0))

Step 1

Concept

Here (D=\(-2\sqrt{6}\)2-4(3)(2)=0). Hence both roots are equal.

Step 2

Why this answer is correct

The correct answer is A. दो वास्तविक और समान ((D=0)) / Two real and equal ((D=0)). Here (D=\(-2\sqrt{6}\)2-4(3)(2)=0). Hence both roots are equal.

Step 3

Exam Tip

यहाँ (D=\(-2\sqrt{6}\)2-4(3)(2)=0) है। अतः दोनों मूल समान हैं।

Open Question Page
Ask Friends

यदि (a>0) और (c>0) हो तथा (b=0), तो \(ax^2+c=0\) के मूलों की प्रकृति क्या होगी?

If (a>0), (c>0), and (b=0), what will be the nature of roots of \(ax^2+c=0\)?

Explanation opens after your attempt
Correct Answer

A. कोई वास्तविक मूल नहींNo real roots

Step 1

Concept

Here \(D=0^2-4ac=-4ac<0\). Therefore real roots will not exist.

Step 2

Why this answer is correct

The correct answer is A. कोई वास्तविक मूल नहीं / No real roots. Here \(D=0^2-4ac=-4ac<0\). Therefore real roots will not exist.

Step 3

Exam Tip

यहाँ \(D=0^2-4ac=-4ac<0\) है। इसलिए वास्तविक मूल नहीं होंगे।

Open Question Page
Ask Friends

समीकरण \(4x^2-4\sqrt{3}x+3=0\) के मूलों की प्रकृति क्या है?

What is the nature of roots of \(4x^2-4\sqrt{3}x+3=0\)?

Explanation opens after your attempt
Correct Answer

A. दो वास्तविक और समान ((D=0))Two real and equal ((D=0))

Step 1

Concept

Here (D=\(-4\sqrt{3}\)2-4(4)(3)=0). When (D=0), both roots are equal.

Step 2

Why this answer is correct

The correct answer is A. दो वास्तविक और समान ((D=0)) / Two real and equal ((D=0)). Here (D=\(-4\sqrt{3}\)2-4(4)(3)=0). When (D=0), both roots are equal.

Step 3

Exam Tip

यहाँ (D=\(-4\sqrt{3}\)2-4(4)(3)=0) है। (D=0) होने पर दोनों मूल समान होते हैं।

Open Question Page
Ask Friends

समीकरण \(7x^2-5x-3=0\) के मूलों की प्रकृति क्या होगी?

What will be the nature of roots of \(7x^2-5x-3=0\)?

Explanation opens after your attempt
Correct Answer

A. दो वास्तविक अपरिमेय और असमान ((D=109))Two real irrational and distinct ((D=109))

Step 1

Concept

Here (D=(-5)2-4(7)(-3)=109). (109) is positive but not a perfect square, so the roots are irrational and distinct.

Step 2

Why this answer is correct

The correct answer is A. दो वास्तविक अपरिमेय और असमान ((D=109)) / Two real irrational and distinct ((D=109)). Here (D=(-5)2-4(7)(-3)=109). (109) is positive but not a perfect square, so the roots are irrational and distinct.

Step 3

Exam Tip

यहाँ (D=(-5)2-4(7)(-3)=109) है। (109) धनात्मक है पर पूर्ण वर्ग नहीं है, इसलिए मूल अपरिमेय और असमान हैं।

Open Question Page
Ask Friends

समीकरण \(4x^2-5x-2=0\) के मूलों की प्रकृति क्या होगी?

What will be the nature of roots of \(4x^2-5x-2=0\)?

Explanation opens after your attempt
Correct Answer

A. दो वास्तविक अपरिमेय और असमान ((D=57))Two real irrational and distinct ((D=57))

Step 1

Concept

Here (D=(-5)2-4(4)(-2)=57). (57) is positive but not a perfect square, so the roots are irrational and distinct.

Step 2

Why this answer is correct

The correct answer is A. दो वास्तविक अपरिमेय और असमान ((D=57)) / Two real irrational and distinct ((D=57)). Here (D=(-5)2-4(4)(-2)=57). (57) is positive but not a perfect square, so the roots are irrational and distinct.

Step 3

Exam Tip

यहाँ (D=(-5)2-4(4)(-2)=57) है। (57) धनात्मक है पर पूर्ण वर्ग नहीं है, इसलिए मूल अपरिमेय असमान हैं।

Open Question Page
Ask Friends

समीकरण \(x^2-19x+90=0\) के मूलों की प्रकृति बताइए।

State the nature of roots of \(x^2-19x+90=0\).

Explanation opens after your attempt
Correct Answer

A. दो वास्तविक परिमेय और असमान ((D=1))Two real rational and distinct ((D=1))

Step 1

Concept

Here (D=(-19)2-4(1)(90)=1). (D=1) gives rational and distinct roots.

Step 2

Why this answer is correct

The correct answer is A. दो वास्तविक परिमेय और असमान ((D=1)) / Two real rational and distinct ((D=1)). Here (D=(-19)2-4(1)(90)=1). (D=1) gives rational and distinct roots.

Step 3

Exam Tip

यहाँ (D=(-19)2-4(1)(90)=1) है। (D=1) से परिमेय और असमान मूल मिलते हैं।

Open Question Page
Ask Friends

समीकरण \(5x^2-14x+11=0\) के मूलों की प्रकृति क्या है?

What is the nature of roots of \(5x^2-14x+11=0\)?

Explanation opens after your attempt
Correct Answer

A. कोई वास्तविक मूल नहीं ((D=-24))No real roots ((D=-24))

Step 1

Concept

Here (D=(-14)2-4(5)(11)=-24). When (D<0), real roots do not exist.

Step 2

Why this answer is correct

The correct answer is A. कोई वास्तविक मूल नहीं ((D=-24)) / No real roots ((D=-24)). Here (D=(-14)2-4(5)(11)=-24). When (D<0), real roots do not exist.

Step 3

Exam Tip

यहाँ (D=(-14)2-4(5)(11)=-24) है। (D<0) होने पर वास्तविक मूल नहीं होते।

Open Question Page
Ask Friends

समीकरण \(2x^2-7x+1=0\) के मूलों की प्रकृति बताइए।

State the nature of roots of \(2x^2-7x+1=0\).

Explanation opens after your attempt
Correct Answer

A. दो वास्तविक अपरिमेय और असमान ((D=41))Two real irrational and distinct ((D=41))

Step 1

Concept

Here (D=(-7)2-4(2)(1)=41). (41) is not a perfect square, so the roots are irrational.

Step 2

Why this answer is correct

The correct answer is A. दो वास्तविक अपरिमेय और असमान ((D=41)) / Two real irrational and distinct ((D=41)). Here (D=(-7)2-4(2)(1)=41). (41) is not a perfect square, so the roots are irrational.

Step 3

Exam Tip

यहाँ (D=(-7)2-4(2)(1)=41) है। (41) पूर्ण वर्ग नहीं है, इसलिए मूल अपरिमेय हैं।

Open Question Page
Ask Friends

समीकरण \(3x^2+x+4=0\) के मूलों की प्रकृति क्या है?

What is the nature of roots of \(3x^2+x+4=0\)?

Explanation opens after your attempt
Correct Answer

A. कोई वास्तविक मूल नहीं ((D=-47))No real roots ((D=-47))

Step 1

Concept

Here (D=12-4(3)(4)=-47). When (D<0), real roots do not exist.

Step 2

Why this answer is correct

The correct answer is A. कोई वास्तविक मूल नहीं ((D=-47)) / No real roots ((D=-47)). Here (D=12-4(3)(4)=-47). When (D<0), real roots do not exist.

Step 3

Exam Tip

यहाँ (D=12-4(3)(4)=-47) है। (D<0) होने पर वास्तविक मूल नहीं होते।

Open Question Page
Ask Friends

समीकरण \(12x^2-12x+3=0\) में मूलों की प्रकृति क्या है?

What is the nature of roots in \(12x^2-12x+3=0\)?

Explanation opens after your attempt
Correct Answer

A. दो वास्तविक और समान ((D=0))Two real and equal ((D=0))

Step 1

Concept

Here (D=(-12)2-4(12)(3)=0). It can also be written as (3(2x-1)2=0).

Step 2

Why this answer is correct

The correct answer is A. दो वास्तविक और समान ((D=0)) / Two real and equal ((D=0)). Here (D=(-12)2-4(12)(3)=0). It can also be written as (3(2x-1)2=0).

Step 3

Exam Tip

यहाँ (D=(-12)2-4(12)(3)=0) है। इसे (3(2x-1)2=0) भी लिख सकते हैं।

Open Question Page
Ask Friends

समीकरण \(8x^2+2x-3=0\) के मूलों की प्रकृति बताइए।

State the nature of roots of \(8x^2+2x-3=0\).

Explanation opens after your attempt
Correct Answer

A. दो वास्तविक परिमेय और असमान ((D=100))Two real rational and distinct ((D=100))

Step 1

Concept

Here (D=22-4(8)(-3)=100). Since (100) is a perfect square, the roots are rational.

Step 2

Why this answer is correct

The correct answer is A. दो वास्तविक परिमेय और असमान ((D=100)) / Two real rational and distinct ((D=100)). Here (D=22-4(8)(-3)=100). Since (100) is a perfect square, the roots are rational.

Step 3

Exam Tip

यहाँ (D=22-4(8)(-3)=100) है। (100) पूर्ण वर्ग है इसलिए मूल परिमेय हैं।

Open Question Page
Ask Friends