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48 results found for "discriminant" in Class 10.

Question Expert Mathematics Polynomials Irrational numbers and real numbers Class 10 Level 25

यदि किसी एकक द्विघात बहुपद के शून्यक \(a+\sqrt{b}\) और \(a-\sqrt{b}\) हैं, तो उसके विविक्तकर का मान क्या होगा?

If the zeroes of a monic quadratic polynomial are \(a+\sqrt{b}\) and \(a-\sqrt{b}\), what will be its discriminant?

Explanation opens after your attempt
Correct Answer

A. (4b)

Step 1

Concept

The polynomial is (x-2-2ax+\(a^2-b\)). Its discriminant is (4a-2-4\(a^2-b\)=4b).

Step 2

Why this answer is correct

The correct answer is A. (4b). The polynomial is (x-2-2ax+\(a^2-b\)). Its discriminant is (4a-2-4\(a^2-b\)=4b).

Step 3

Exam Tip

बहुपद (x-2-2ax+\(a^2-b\)) होगा। इसका विविक्तकर (4a-2-4\(a^2-b\)=4b) है।

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Question Expert Mathematics Polynomials Irrational numbers and real numbers Class 10 Level 25

यदि (p(x)=x-2+2\sqrt{7}x+6), तो विविक्तकर क्या है?

If (p(x)=x-2+2\sqrt{7}x+6), what is the discriminant?

Explanation opens after your attempt
Correct Answer

A. (4)

Step 1

Concept

(D=\(2\sqrt{7}\)2-4\cdot1\cdot6=28-24=4). Even with an irrational coefficient, the discriminant can be rational.

Step 2

Why this answer is correct

The correct answer is A. (4). (D=\(2\sqrt{7}\)2-4\cdot1\cdot6=28-24=4). Even with an irrational coefficient, the discriminant can be rational.

Step 3

Exam Tip

(D=\(2\sqrt{7}\)2-4\cdot1\cdot6=28-24=4)। अपरिमेय गुणांक होने पर भी विविक्तकर परिमेय हो सकता है।

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Question Expert Mathematics Polynomials Irrational numbers and real numbers Class 10 Level 27

यदि (p(x)=x-2-14x+38), तो शून्यकों का सही प्रकार क्या है?

If (p(x)=x-2-14x+38), what is the correct type of its zeroes?

Explanation opens after your attempt
Correct Answer

A. वास्तविक अपरिमेयReal irrational

Step 1

Concept

The discriminant is (196-152=44) and \(\sqrt{44}\) is irrational. Hence the zeroes are real irrational.

Step 2

Why this answer is correct

The correct answer is A. वास्तविक अपरिमेय / Real irrational. The discriminant is (196-152=44) and \(\sqrt{44}\) is irrational. Hence the zeroes are real irrational.

Step 3

Exam Tip

विविक्तकर (196-152=44) है और \(\sqrt{44}\) अपरिमेय है। इसलिए शून्यक वास्तविक अपरिमेय हैं।

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Question Expert Mathematics Polynomials Irrational numbers and real numbers Class 10 Level 27

यदि (p(x)=x-2-14x+40), तो शून्यकों का प्रकार क्या है?

If (p(x)=x-2-14x+40), what is the type of its zeroes?

Explanation opens after your attempt
Correct Answer

A. वास्तविक अपरिमेयReal irrational

Step 1

Concept

The discriminant is (196-160=36) so the zeroes are rational. The correct type should be real rational.

Step 2

Why this answer is correct

The correct answer is A. वास्तविक अपरिमेय / Real irrational. The discriminant is (196-160=36) so the zeroes are rational. The correct type should be real rational.

Step 3

Exam Tip

विविक्तकर (196-160=36) है इसलिए शून्यक परिमेय होंगे यह कथन गलत नहीं बल्कि सही है। यहां सही प्रकार वास्तविक परिमेय होना चाहिए।

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Question Expert Mathematics Polynomials Irrational numbers and real numbers Class 10 Level 27

यदि (p(x)=x-2-14x+45), तो शून्यकों का प्रकार क्या है?

If (p(x)=x-2-14x+45), what is the type of its zeroes?

Explanation opens after your attempt
Correct Answer

A. वास्तविक परिमेयReal rational

Step 1

Concept

The discriminant is (196-180=16) and \(\sqrt{16}=4\) is rational. Hence the zeroes are real rational.

Step 2

Why this answer is correct

The correct answer is A. वास्तविक परिमेय / Real rational. The discriminant is (196-180=16) and \(\sqrt{16}=4\) is rational. Hence the zeroes are real rational.

Step 3

Exam Tip

विविक्तकर (196-180=16) है और \(\sqrt{16}=4\) परिमेय है। इसलिए शून्यक वास्तविक परिमेय हैं।

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Question Expert Mathematics Polynomials Irrational numbers and real numbers Class 10 Level 27

यदि (p(x)=x-2-8x+13), तो इसके शून्यक कौन से हैं?

If (p(x)=x-2-8x+13), what are its zeroes?

Explanation opens after your attempt
Correct Answer

A. \(4+\sqrt{3}\) और \(4-\sqrt{3}\)\(4+\sqrt{3}\) and \(4-\sqrt{3}\)

Step 1

Concept

Using the quadratic formula \(x=\frac{8\pm\sqrt{64-52}}{2}=4\pm\sqrt{3}\). In exams simplify the discriminant.

Step 2

Why this answer is correct

The correct answer is A. \(4+\sqrt{3}\) और \(4-\sqrt{3}\) / \(4+\sqrt{3}\) and \(4-\sqrt{3}\). Using the quadratic formula \(x=\frac{8\pm\sqrt{64-52}}{2}=4\pm\sqrt{3}\). In exams simplify the discriminant.

Step 3

Exam Tip

द्विघात सूत्र से \(x=\frac{8\pm\sqrt{64-52}}{2}=4\pm\sqrt{3}\) मिलता है। परीक्षा में विविक्तकर को सरल करें।

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Question Expert Mathematics Polynomials Irrational numbers and real numbers Class 10 Level 26

यदि (p(x)=x-2-10x+23), तो इसके शून्यक किस प्रकार के हैं?

If (p(x)=x-2-10x+23), what type of zeroes does it have?

Explanation opens after your attempt
Correct Answer

A. वास्तविक अपरिमेयReal irrational

Step 1

Concept

The discriminant is (100-92=8), and \(\sqrt{8}\) is irrational, so the zeroes are real irrational. In exams check the square root of the discriminant.

Step 2

Why this answer is correct

The correct answer is A. वास्तविक अपरिमेय / Real irrational. The discriminant is (100-92=8), and \(\sqrt{8}\) is irrational, so the zeroes are real irrational. In exams check the square root of the discriminant.

Step 3

Exam Tip

विविक्तकर (100-92=8) है और \(\sqrt{8}\) अपरिमेय है, इसलिए शून्यक वास्तविक अपरिमेय हैं। परीक्षा में विविक्तकर का वर्गमूल देखें।

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Question Expert Mathematics Polynomials Irrational numbers and real numbers Class 10 Level 26

यदि (p(x)=x-2-4x-1), तो इसके शून्यक कौन से हैं?

If (p(x)=x-2-4x-1), what are its zeroes?

Explanation opens after your attempt
Correct Answer

A. \(2+\sqrt{5}\) और \(2-\sqrt{5}\)\(2+\sqrt{5}\) and \(2-\sqrt{5}\)

Step 1

Concept

Using the quadratic formula, \(x=\frac{4\pm\sqrt{16+4}}{2}=2\pm\sqrt{5}\). In exams simplify the discriminant.

Step 2

Why this answer is correct

The correct answer is A. \(2+\sqrt{5}\) और \(2-\sqrt{5}\) / \(2+\sqrt{5}\) and \(2-\sqrt{5}\). Using the quadratic formula, \(x=\frac{4\pm\sqrt{16+4}}{2}=2\pm\sqrt{5}\). In exams simplify the discriminant.

Step 3

Exam Tip

द्विघात सूत्र से \(x=\frac{4\pm\sqrt{16+4}}{2}=2\pm\sqrt{5}\) मिलता है। परीक्षा में विविक्तकर को सरल करें।

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Question Hard Mathematics Polynomials Irrational numbers and real numbers Class 10 Level 26

किस मान के लिए \(x^2-2kx+2=0\) के मूल अपरिमेय और वास्तविक होंगे?

For which value of (k) will the roots of \(x^2-2kx+2=0\) be irrational and real?

Explanation opens after your attempt
Correct Answer

B. (k=2)

Step 1

Concept

For (k=2), the discriminant is (16-8=8), positive but not a perfect square. Therefore the roots are real and irrational.

Step 2

Why this answer is correct

The correct answer is B. (k=2). For (k=2), the discriminant is (16-8=8), positive but not a perfect square. Therefore the roots are real and irrational.

Step 3

Exam Tip

(k=2) पर विविक्तकर (16-8=8), जो धनात्मक पर पूर्ण वर्ग नहीं है। इसलिए मूल वास्तविक और अपरिमेय होंगे।

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Question Hard Mathematics Polynomials Irrational numbers and real numbers Class 10 Level 28

यदि \(x^2+2x+5=0\), तो वास्तविक संख्या पद्धति में मूलों के बारे में कौन सा कथन सही है?

If \(x^2+2x+5=0\), which statement about the roots in the real number system is correct?

Explanation opens after your attempt
Correct Answer

C. कोई वास्तविक मूल नहीं हैThere are no real roots

Step 1

Concept

The discriminant is (4-20=-16), which is negative, so there are no real roots. In exams do not treat a negative discriminant as real zeroes.

Step 2

Why this answer is correct

The correct answer is C. कोई वास्तविक मूल नहीं है / There are no real roots. The discriminant is (4-20=-16), which is negative, so there are no real roots. In exams do not treat a negative discriminant as real zeroes.

Step 3

Exam Tip

विविक्तकर (4-20=-16) ऋणात्मक है, इसलिए वास्तविक मूल नहीं हैं। परीक्षा में ऋणात्मक विविक्तकर को वास्तविक शून्यक नहीं मानें।

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Question Hard Mathematics Polynomials Irrational numbers and real numbers Class 10 Level 28

यदि \(x^2-4x+4=0\), तो मूलों की प्रकृति क्या है?

If \(x^2-4x+4=0\), what is the nature of the roots?

Explanation opens after your attempt
Correct Answer

B. दो समान परिमेयTwo equal rational roots

Step 1

Concept

The discriminant is (16-16=0), so the roots are equal and (x=2) is rational. In exams (D=0) means equal roots.

Step 2

Why this answer is correct

The correct answer is B. दो समान परिमेय / Two equal rational roots. The discriminant is (16-16=0), so the roots are equal and (x=2) is rational. In exams (D=0) means equal roots.

Step 3

Exam Tip

विविक्तकर (16-16=0), इसलिए मूल समान हैं और (x=2) परिमेय है। परीक्षा में (D=0) का अर्थ समान मूल होता है।

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Question Hard Mathematics Polynomials Irrational numbers and real numbers Class 10 Level 28

यदि \(x^2-6x+1=0\), तो (x) के मान किस प्रकार के हैं?

If \(x^2-6x+1=0\), what type are the values of (x)?

Explanation opens after your attempt
Correct Answer

C. दो अलग अपरिमेय वास्तविकTwo distinct irrational real values

Step 1

Concept

The discriminant is (36-4=32), positive but not a perfect square. So there are two distinct irrational real roots.

Step 2

Why this answer is correct

The correct answer is C. दो अलग अपरिमेय वास्तविक / Two distinct irrational real values. The discriminant is (36-4=32), positive but not a perfect square. So there are two distinct irrational real roots.

Step 3

Exam Tip

विविक्तकर (36-4=32) है, जो पूर्ण वर्ग नहीं है और धनात्मक है। इसलिए दो अलग अपरिमेय वास्तविक मूल मिलते हैं।

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Question Hard Mathematics Polynomials Irrational numbers and real numbers Class 10 Level 28

यदि (p(x)=x-2-10x+19) है, तो इसके शून्यक कौन से हैं?

If (p(x)=x-2-10x+19), what are its zeroes?

Explanation opens after your attempt
Correct Answer

A. \(5+\sqrt{6},5-\sqrt{6}\)

Step 1

Concept

The discriminant is (100-76=24), so the zeroes are \(\frac{10\pm\sqrt{24}}{2}=5\pm\sqrt{6}\). Simplify \(\sqrt{24}=2\sqrt{6}\) in exams.

Step 2

Why this answer is correct

The correct answer is A. \(5+\sqrt{6},5-\sqrt{6}\). The discriminant is (100-76=24), so the zeroes are \(\frac{10\pm\sqrt{24}}{2}=5\pm\sqrt{6}\). Simplify \(\sqrt{24}=2\sqrt{6}\) in exams.

Step 3

Exam Tip

विविक्तकर (100-76=24) है, इसलिए शून्यक \(\frac{10\pm\sqrt{24}}{2}=5\pm\sqrt{6}\) हैं। परीक्षा में \(\sqrt{24}=2\sqrt{6}\) सरल करें।

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Question Expert Mathematics Polynomials Irrational numbers and real numbers Class 10 Level 25

यदि (p(x)=x-2-2x-3\sqrt{2}) है, तो स्थिर पद का शून्यकों से संबंध क्या बताता है?

If (p(x)=x-2-2x-3\sqrt{2}), what does the constant term tell about the zeroes?

Explanation opens after your attempt
Correct Answer

A. शून्यकों का गुणनफल \(-3\sqrt{2}\) हैThe product of zeroes is \(-3\sqrt{2}\)

Step 1

Concept

In a monic quadratic, the constant term is the product of zeroes. Here \(\alpha\beta=-3\sqrt{2}\).

Step 2

Why this answer is correct

The correct answer is A. शून्यकों का गुणनफल \(-3\sqrt{2}\) है / The product of zeroes is \(-3\sqrt{2}\). In a monic quadratic, the constant term is the product of zeroes. Here \(\alpha\beta=-3\sqrt{2}\).

Step 3

Exam Tip

एकक द्विघात में स्थिर पद शून्यकों का गुणनफल होता है। यहाँ \(\alpha\beta=-3\sqrt{2}\) है।

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Question Expert Mathematics Polynomials Irrational numbers and real numbers Class 10 Level 25

यदि (p(x)=x-2-11x+24) और (q(x)=x-2-11x+23), तो कौन सा कथन सही है?

If (p(x)=x-2-11x+24) and (q(x)=x-2-11x+23), which statement is correct?

Explanation opens after your attempt
Correct Answer

A. (p(x)) के शून्यक परिमेय और (q(x)) के अपरिमेय वास्तविक हैं(p(x)) has rational zeroes and (q(x)) has irrational real zeroes

Step 1

Concept

For (p(x)), (D=121-96=25), a perfect square. For (q(x)), (D=121-92=29), positive and not a perfect square.

Step 2

Why this answer is correct

The correct answer is A. (p(x)) के शून्यक परिमेय और (q(x)) के अपरिमेय वास्तविक हैं / (p(x)) has rational zeroes and (q(x)) has irrational real zeroes. For (p(x)), (D=121-96=25), a perfect square. For (q(x)), (D=121-92=29), positive and not a perfect square.

Step 3

Exam Tip

(p(x)) के लिए (D=121-96=25) पूर्ण वर्ग है। (q(x)) के लिए (D=121-92=29) धनात्मक अपूर्ण वर्ग है।

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Question Expert Mathematics Polynomials Irrational numbers and real numbers Class 10 Level 25

यदि (p(x)=x-2-2\sqrt{2}x+1) है, तो शून्यकों का प्रकार क्या है?

If (p(x)=x-2-2\sqrt{2}x+1), what is the type of its zeroes?

Explanation opens after your attempt
Correct Answer

A. दो भिन्न वास्तविक अपरिमेयTwo distinct real irrational

Step 1

Concept

(D=\(2\sqrt{2}\)2-4=8-4=4), and the zeroes are \(\sqrt{2}\pm1\). They are real and irrational.

Step 2

Why this answer is correct

The correct answer is A. दो भिन्न वास्तविक अपरिमेय / Two distinct real irrational. (D=\(2\sqrt{2}\)2-4=8-4=4), and the zeroes are \(\sqrt{2}\pm1\). They are real and irrational.

Step 3

Exam Tip

(D=\(2\sqrt{2}\)2-4=8-4=4) है और शून्यक \(\sqrt{2}\pm1\) हैं। ये वास्तविक और अपरिमेय हैं।

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Question Expert Mathematics Polynomials Irrational numbers and real numbers Class 10 Level 25

यदि (p(x)=x-2+2\sqrt{7}x+6), तो इसके शून्यक कौन से हैं?

If (p(x)=x-2+2\sqrt{7}x+6), what are its zeroes?

Explanation opens after your attempt
Correct Answer

A. \(-\sqrt{7}+1\) और \(-\sqrt{7}-1\)\(-\sqrt{7}+1\) and \(-\sqrt{7}-1\)

Step 1

Concept

Using the formula, \(x=\frac{-2\sqrt{7}\pm2}{2}=-\sqrt{7}\pm1\). Simplifying the discriminant first gives a clean answer.

Step 2

Why this answer is correct

The correct answer is A. \(-\sqrt{7}+1\) और \(-\sqrt{7}-1\) / \(-\sqrt{7}+1\) and \(-\sqrt{7}-1\). Using the formula, \(x=\frac{-2\sqrt{7}\pm2}{2}=-\sqrt{7}\pm1\). Simplifying the discriminant first gives a clean answer.

Step 3

Exam Tip

सूत्र से \(x=\frac{-2\sqrt{7}\pm2}{2}=-\sqrt{7}\pm1\)। पहले विविक्तकर सरल करने से उत्तर साफ मिलता है।

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Question Expert Mathematics Polynomials Irrational numbers and real numbers Class 10 Level 25

किस शर्त में \(x^2+bx+c\) के शून्यक परिमेय नहीं बल्कि वास्तविक होंगे?

Under which condition will the zeroes of \(x^2+bx+c\) be real but not rational?

Explanation opens after your attempt
Correct Answer

A. \(b^2-4c\) धनात्मक अपूर्ण वर्ग हो\(b^2-4c\) is positive and not a perfect square

Step 1

Concept

For real zeroes, the discriminant must be positive, and for irrational zeroes it must not be a perfect square. This is the key check for quadratics with rational coefficients.

Step 2

Why this answer is correct

The correct answer is A. \(b^2-4c\) धनात्मक अपूर्ण वर्ग हो / \(b^2-4c\) is positive and not a perfect square. For real zeroes, the discriminant must be positive, and for irrational zeroes it must not be a perfect square. This is the key check for quadratics with rational coefficients.

Step 3

Exam Tip

वास्तविक शून्यकों के लिए विविक्तकर धनात्मक चाहिए और अपरिमेय शून्यकों के लिए वह पूर्ण वर्ग नहीं होना चाहिए। परिमेय गुणांकों वाले द्विघात में यही मुख्य जाँच है।

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Question Expert Mathematics Polynomials Irrational numbers and real numbers Class 10 Level 25

यदि (p(x)=x-2+2x-8) और (q(x)=x-2+2x-7) हैं, तो सही तुलना कौन सी है?

If (p(x)=x-2+2x-8) and (q(x)=x-2+2x-7), which comparison is correct?

Explanation opens after your attempt
Correct Answer

A. (p(x)) के शून्यक परिमेय हैं और (q(x)) के शून्यक अपरिमेय वास्तविक हैं(p(x)) has rational zeroes and (q(x)) has irrational real zeroes

Step 1

Concept

For (p(x)), (D=4+32=36), a perfect square. For (q(x)), (D=4+28=32), positive and not a perfect square.

Step 2

Why this answer is correct

The correct answer is A. (p(x)) के शून्यक परिमेय हैं और (q(x)) के शून्यक अपरिमेय वास्तविक हैं / (p(x)) has rational zeroes and (q(x)) has irrational real zeroes. For (p(x)), (D=4+32=36), a perfect square. For (q(x)), (D=4+28=32), positive and not a perfect square.

Step 3

Exam Tip

(p(x)) के लिए (D=4+32=36) पूर्ण वर्ग है। (q(x)) के लिए (D=4+28=32) धनात्मक अपूर्ण वर्ग है।

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Question Expert Mathematics Polynomials Irrational numbers and real numbers Class 10 Level 25

कौन सा बहुपद परिमेय गुणांकों वाला है और उसके दोनों शून्यक अपरिमेय वास्तविक हैं?

Which polynomial has rational coefficients and both zeroes irrational real?

Explanation opens after your attempt
Correct Answer

A. \(x^2-8x+3\)

Step 1

Concept

For \(x^2-8x+3\), (D=64-12=52), positive and not a perfect square. The other options give equal rational, non-real, or rational zeroes.

Step 2

Why this answer is correct

The correct answer is A. \(x^2-8x+3\). For \(x^2-8x+3\), (D=64-12=52), positive and not a perfect square. The other options give equal rational, non-real, or rational zeroes.

Step 3

Exam Tip

\(x^2-8x+3\) के लिए (D=64-12=52), जो धनात्मक अपूर्ण वर्ग है। बाकी विकल्पों में शून्यक समान परिमेय, अवास्तविक या परिमेय हैं।

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Question Expert Mathematics Polynomials Irrational numbers and real numbers Class 10 Level 25

यदि (p(x)=3x-2-18x+21) है, तो इसके शून्यक किस प्रकार के हैं?

If (p(x)=3x-2-18x+21), what type of zeroes does it have?

Explanation opens after your attempt
Correct Answer

B. वास्तविक और अपरिमेयReal and irrational

Step 1

Concept

After removing the common factor, we get \(x^2-6x+7\), and (D=36-28=8). Since (D) is positive and not a perfect square, the zeroes are real irrational.

Step 2

Why this answer is correct

The correct answer is B. वास्तविक और अपरिमेय / Real and irrational. After removing the common factor, we get \(x^2-6x+7\), and (D=36-28=8). Since (D) is positive and not a perfect square, the zeroes are real irrational.

Step 3

Exam Tip

सामान्य गुणनखंड हटाने पर \(x^2-6x+7\) मिलता है और (D=36-28=8)। (D) धनात्मक अपूर्ण वर्ग है, इसलिए शून्यक वास्तविक अपरिमेय हैं।

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Question Expert Mathematics Polynomials Irrational numbers and real numbers Class 10 Level 25

किस मान पर \(x^2-6x+k\) के शून्यक वास्तविक और अपरिमेय होंगे?

For which value of (k) will \(x^2-6x+k\) have real and irrational zeroes?

Explanation opens after your attempt
Correct Answer

C. (k=10)

Step 1

Concept

Here (D=36-4k). For (k=10), (D=36-40=-4), so this is not correct.

Step 2

Why this answer is correct

The correct answer is C. (k=10). Here (D=36-4k). For (k=10), (D=36-40=-4), so this is not correct.

Step 3

Exam Tip

यहाँ (D=36-4k) है। (k=10) पर (D=-4) नहीं बल्कि (D=36-40=-4), इसलिए यह सही नहीं है।

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Question Hard Mathematics Polynomials Irrational numbers and real numbers Class 10 Level 27

यदि (p(x)=x-2-9x+14) और (q(x)=x-2-9x+15) हैं, तो शून्यकों के प्रकार के बारे में सही कथन कौन सा है?

If (p(x)=x-2-9x+14) and (q(x)=x-2-9x+15), which statement about the types of zeroes is correct?

Explanation opens after your attempt
Correct Answer

A. (p(x)) के शून्यक परिमेय हैं और (q(x)) के शून्यक अपरिमेय वास्तविक हैंZeroes of (p(x)) are rational and zeroes of (q(x)) are irrational real

Step 1

Concept

For (p(x)), (D=81-56=25), a perfect square, so the zeroes are rational. For (q(x)), (D=81-60=21), positive but not a perfect square, so the zeroes are irrational real.

Step 2

Why this answer is correct

The correct answer is A. (p(x)) के शून्यक परिमेय हैं और (q(x)) के शून्यक अपरिमेय वास्तविक हैं / Zeroes of (p(x)) are rational and zeroes of (q(x)) are irrational real. For (p(x)), (D=81-56=25), a perfect square, so the zeroes are rational. For (q(x)), (D=81-60=21), positive but not a perfect square, so the zeroes are irrational real.

Step 3

Exam Tip

(p(x)) के लिए (D=81-56=25) पूर्ण वर्ग है, इसलिए शून्यक परिमेय हैं। (q(x)) के लिए (D=81-60=21) धनात्मक अपूर्ण वर्ग है, इसलिए शून्यक अपरिमेय वास्तविक हैं।

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Question Hard Mathematics Polynomials Irrational numbers and real numbers Class 10 Level 27

यदि (p(x)=x-2-2x+5) है, तो इसके शून्यक वास्तविक न होने का कारण क्या है?

If (p(x)=x-2-2x+5), what is the reason its zeroes are not real?

Explanation opens after your attempt
Correct Answer

A. (D<0)

Step 1

Concept

Here (D=4-20=-16), which is negative. A negative discriminant means there are no real zeroes.

Step 2

Why this answer is correct

The correct answer is A. (D<0). Here (D=4-20=-16), which is negative. A negative discriminant means there are no real zeroes.

Step 3

Exam Tip

यहाँ (D=4-20=-16), जो ऋणात्मक है। ऋणात्मक विविक्तकर का अर्थ वास्तविक शून्यक नहीं होते।

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Question Hard Mathematics Polynomials Irrational numbers and real numbers Class 10 Level 27

यदि (p(x)=x-2-14x+45) और (q(x)=x-2-14x+43), तो कौन सा कथन सही है?

If (p(x)=x-2-14x+45) and (q(x)=x-2-14x+43), which statement is correct?

Explanation opens after your attempt
Correct Answer

A. (p(x)) के शून्यक परिमेय हैं और (q(x)) के अपरिमेय वास्तविक हैंZeroes of (p(x)) are rational and zeroes of (q(x)) are irrational real

Step 1

Concept

For (p(x)), (D=16) is a perfect square, and for (q(x)), (D=24) is positive but not a perfect square. Thus the first has rational and the second irrational real zeroes.

Step 2

Why this answer is correct

The correct answer is A. (p(x)) के शून्यक परिमेय हैं और (q(x)) के अपरिमेय वास्तविक हैं / Zeroes of (p(x)) are rational and zeroes of (q(x)) are irrational real. For (p(x)), (D=16) is a perfect square, and for (q(x)), (D=24) is positive but not a perfect square. Thus the first has rational and the second irrational real zeroes.

Step 3

Exam Tip

(p(x)) के लिए (D=16) पूर्ण वर्ग है और (q(x)) के लिए (D=24) धनात्मक अपूर्ण वर्ग है। इसलिए पहला परिमेय और दूसरा अपरिमेय वास्तविक है।

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Question Hard Mathematics Polynomials Irrational numbers and real numbers Class 10 Level 27

यदि (p(x)=x-2-14x+45) और (q(x)=x-2-14x+40), तो कौन सा कथन सही है?

If (p(x)=x-2-14x+45) and (q(x)=x-2-14x+40), which statement is correct?

Explanation opens after your attempt
Correct Answer

A. (p(x)) के शून्यक परिमेय हैं और (q(x)) के अपरिमेय वास्तविक हैंZeroes of (p(x)) are rational and zeroes of (q(x)) are irrational real

Step 1

Concept

For (p(x)), (D=196-180=16), while for (q(x)), (D=196-160=36), so both are rational. Therefore the listed intended contrast is not valid.

Step 2

Why this answer is correct

The correct answer is A. (p(x)) के शून्यक परिमेय हैं और (q(x)) के अपरिमेय वास्तविक हैं / Zeroes of (p(x)) are rational and zeroes of (q(x)) are irrational real. For (p(x)), (D=196-180=16), while for (q(x)), (D=196-160=36), so both are rational. Therefore the listed intended contrast is not valid.

Step 3

Exam Tip

(p(x)) के लिए (D=196-180=16), जबकि (q(x)) के लिए (D=196-160=36) है, इसलिए दोनों परिमेय हैं। इसलिए सही कथन विकल्प में नहीं है।

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Question Hard Mathematics Polynomials Irrational numbers and real numbers Class 10 Level 27

यदि \(\alpha\) और \(\beta\) \(x^2-7x+5\) के शून्यक हैं, तो \(\alpha\) और \(\beta\) का प्रकार क्या होगा?

If \(\alpha\) and \(\beta\) are zeroes of \(x^2-7x+5\), what will be the type of \(\alpha\) and \(\beta\)?

Explanation opens after your attempt
Correct Answer

A. दोनों अपरिमेय वास्तविकBoth irrational real

Step 1

Concept

(D=49-20=29) is positive and not a perfect square. Therefore both zeroes are irrational real.

Step 2

Why this answer is correct

The correct answer is A. दोनों अपरिमेय वास्तविक / Both irrational real. (D=49-20=29) is positive and not a perfect square. Therefore both zeroes are irrational real.

Step 3

Exam Tip

(D=49-20=29) धनात्मक और पूर्ण वर्ग नहीं है। इसलिए दोनों शून्यक अपरिमेय वास्तविक होंगे।

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Question Hard Mathematics Polynomials Irrational numbers and real numbers Class 10 Level 27

यदि (p(x)=x-2+6x+6) है, तो उसके शून्यकों का सही वर्गीकरण क्या है?

If (p(x)=x-2+6x+6), what is the correct classification of its zeroes?

Explanation opens after your attempt
Correct Answer

A. वास्तविक और अपरिमेयReal and irrational

Step 1

Concept

(D=36-24=12), which is positive but not a perfect square. Hence the zeroes are real and irrational.

Step 2

Why this answer is correct

The correct answer is A. वास्तविक और अपरिमेय / Real and irrational. (D=36-24=12), which is positive but not a perfect square. Hence the zeroes are real and irrational.

Step 3

Exam Tip

(D=36-24=12) है, जो धनात्मक है पर पूर्ण वर्ग नहीं है। इसलिए शून्यक वास्तविक और अपरिमेय हैं।

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Question Hard Mathematics Polynomials Irrational numbers and real numbers Class 10 Level 27

यदि (p(x)=x-2-8x+7) है, तो इसके शून्यकों की तुलना \(x^2-8x+10\) से कैसे होगी?

If (p(x)=x-2-8x+7), how do its zeroes compare with those of \(x^2-8x+10\)?

Explanation opens after your attempt
Correct Answer

A. पहले के परिमेय, दूसरे के अपरिमेय वास्तविकFirst are rational, second are irrational real

Step 1

Concept

For the first, (D=64-28=36) is a perfect square; for the second, (D=64-40=24) is not. The discriminant quickly tells the type of zeroes.

Step 2

Why this answer is correct

The correct answer is A. पहले के परिमेय, दूसरे के अपरिमेय वास्तविक / First are rational, second are irrational real. For the first, (D=64-28=36) is a perfect square; for the second, (D=64-40=24) is not. The discriminant quickly tells the type of zeroes.

Step 3

Exam Tip

पहले में (D=64-28=36) पूर्ण वर्ग है, दूसरे में (D=64-40=24) पूर्ण वर्ग नहीं है। विविक्तकर से शून्यकों का प्रकार तुरंत पता चलता है।

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Question Hard Mathematics Polynomials Irrational numbers and real numbers Class 10 Level 27

किस मान पर \(x^2-2x+k\) के शून्यक वास्तविक और अपरिमेय होंगे?

For which value of (k) will the zeroes of \(x^2-2x+k\) be real and irrational?

Explanation opens after your attempt
Correct Answer

C. (k=-1)

Step 1

Concept

Here (D=4-4k). For (k=-1), (D=8), which is positive and not a perfect square.

Step 2

Why this answer is correct

The correct answer is C. (k=-1). Here (D=4-4k). For (k=-1), (D=8), which is positive and not a perfect square.

Step 3

Exam Tip

यहाँ (D=4-4k) है। (k=-1) पर (D=8), जो धनात्मक पूर्ण वर्ग नहीं है।

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Question Hard Mathematics Polynomials Irrational numbers and real numbers Class 10 Level 27

यदि (p(x)=x-2+4x+1) है, तो इसके शून्यकों का योग और प्रकार क्या है?

If (p(x)=x-2+4x+1), what are the sum and type of its zeroes?

Explanation opens after your attempt
Correct Answer

A. योग (-4), दोनों अपरिमेय वास्तविकSum (-4), both irrational real

Step 1

Concept

The sum is \(-\frac{b}{a}=-4\) and (D=16-4=12), not a perfect square. Hence both zeroes are irrational real.

Step 2

Why this answer is correct

The correct answer is A. योग (-4), दोनों अपरिमेय वास्तविक / Sum (-4), both irrational real. The sum is \(-\frac{b}{a}=-4\) and (D=16-4=12), not a perfect square. Hence both zeroes are irrational real.

Step 3

Exam Tip

योग \(-\frac{b}{a}=-4\) और (D=16-4=12) है, जो पूर्ण वर्ग नहीं है। इसलिए दोनों शून्यक अपरिमेय वास्तविक हैं।

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Question Hard Mathematics Polynomials Irrational numbers and real numbers Class 10 Level 27

यदि (p(x)=x-2-6x+4) है, तो इसके शून्यक किस प्रकार के हैं?

If (p(x)=x-2-6x+4), what type of zeroes does it have?

Explanation opens after your attempt
Correct Answer

A. दो भिन्न अपरिमेय वास्तविक शून्यकTwo distinct irrational real zeroes

Step 1

Concept

The discriminant is (D=36-16=20), so the zeroes are \(3\pm\sqrt{5}\). If (D) is not a perfect square, real zeroes can be irrational.

Step 2

Why this answer is correct

The correct answer is A. दो भिन्न अपरिमेय वास्तविक शून्यक / Two distinct irrational real zeroes. The discriminant is (D=36-16=20), so the zeroes are \(3\pm\sqrt{5}\). If (D) is not a perfect square, real zeroes can be irrational.

Step 3

Exam Tip

विविक्तकर (D=36-16=20) है, इसलिए शून्यक \(3\pm\sqrt{5}\) हैं। (D) पूर्ण वर्ग न हो तो वास्तविक शून्यक अपरिमेय हो सकते हैं।

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Question Hard Mathematics Polynomials Irrational numbers and real numbers Class 10 Level 26

यदि \(x^2-4x+r\) के शून्यक परिमेय हैं, तो (r=3) रखने पर कथन कैसा है?

If zeroes of \(x^2-4x+r\) are rational, what happens when (r=3)?

Explanation opens after your attempt
Correct Answer

A. कथन सही हैThe statement is true

Step 1

Concept

For (r=3), (D=16-12=4), which is a perfect square. Therefore the zeroes are rational.

Step 2

Why this answer is correct

The correct answer is A. कथन सही है / The statement is true. For (r=3), (D=16-12=4), which is a perfect square. Therefore the zeroes are rational.

Step 3

Exam Tip

(r=3) पर (D=16-12=4) है, जो पूर्ण वर्ग है। इसलिए शून्यक परिमेय हैं।

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Question Hard Mathematics Polynomials Irrational numbers and real numbers Class 10 Level 26

यदि \(x^2-4x+r\) के शून्यक वास्तविक और अपरिमेय हैं, तो (r=2) रखने पर कथन कैसा है?

If zeroes of \(x^2-4x+r\) are to be real and irrational, what happens when (r=2)?

Explanation opens after your attempt
Correct Answer

A. कथन सही हैThe statement is true

Step 1

Concept

For (r=2), (D=16-8=8). It is positive and not a perfect square, so the zeroes are real and irrational.

Step 2

Why this answer is correct

The correct answer is A. कथन सही है / The statement is true. For (r=2), (D=16-8=8). It is positive and not a perfect square, so the zeroes are real and irrational.

Step 3

Exam Tip

(r=2) पर (D=16-8=8) है। यह धनात्मक और अपूर्ण वर्ग है, इसलिए शून्यक वास्तविक और अपरिमेय हैं।

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Question Hard Mathematics Polynomials Irrational numbers and real numbers Class 10 Level 26

यदि (p(x)=x-2+6x+7), तो शून्यक किस प्रकार के हैं?

If (p(x)=x-2+6x+7), what type of zeroes does it have?

Explanation opens after your attempt
Correct Answer

A. दो भिन्न अपरिमेय वास्तविक शून्यकTwo distinct irrational real zeroes

Step 1

Concept

(D=36-28=8). It is positive but not a perfect square, so the zeroes are real and irrational.

Step 2

Why this answer is correct

The correct answer is A. दो भिन्न अपरिमेय वास्तविक शून्यक / Two distinct irrational real zeroes. (D=36-28=8). It is positive but not a perfect square, so the zeroes are real and irrational.

Step 3

Exam Tip

(D=36-28=8) है। (8) धनात्मक है पर पूर्ण वर्ग नहीं, इसलिए शून्यक वास्तविक और अपरिमेय हैं।

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Question Hard Mathematics Polynomials Irrational numbers and real numbers Class 10 Level 28

किस स्थिति में \(x^2-5x+c\) के शून्यक वास्तविक और अपरिमेय होंगे?

In which case will the zeroes of \(x^2-5x+c\) be real and irrational?

Explanation opens after your attempt
Correct Answer

B. जब (25-4c) धनात्मक हो पर पूर्ण वर्ग न होWhen (25-4c) is positive but not a perfect square

Step 1

Concept

For real distinct zeroes, (D>0) is required. For irrational zeroes, (D) must not be a perfect square.

Step 2

Why this answer is correct

The correct answer is B. जब (25-4c) धनात्मक हो पर पूर्ण वर्ग न हो / When (25-4c) is positive but not a perfect square. For real distinct zeroes, (D>0) is required. For irrational zeroes, (D) must not be a perfect square.

Step 3

Exam Tip

वास्तविक भिन्न शून्यकों के लिए (D>0) चाहिए। अपरिमेय शून्यकों के लिए (D) पूर्ण वर्ग नहीं होना चाहिए।

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Question Hard Mathematics Polynomials Irrational numbers and real numbers Class 10 Level 28

यदि (p(x)=x-2-2x-3) है, तो क्या इसके सभी शून्यक वास्तविक हैं?

If (p(x)=x-2-2x-3), are all its zeroes real?

Explanation opens after your attempt
Correct Answer

A. हाँ, क्योंकि (D=16)Yes, because (D=16)

Step 1

Concept

Here (D=(-2)2-4(1)(-3)=16), which is positive. So both zeroes are real.

Step 2

Why this answer is correct

The correct answer is A. हाँ, क्योंकि (D=16) / Yes, because (D=16). Here (D=(-2)2-4(1)(-3)=16), which is positive. So both zeroes are real.

Step 3

Exam Tip

यहाँ (D=(-2)2-4(1)(-3)=16) है, जो धनात्मक है। इसलिए दोनों शून्यक वास्तविक हैं।

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Question Hard Mathematics Polynomials Irrational numbers and real numbers Class 10 Level 28

यदि (p(x)=3x-2-12x+6) है, तो शून्यकों की प्रकृति क्या है?

If (p(x)=3x-2-12x+6), what is the nature of its zeroes?

Explanation opens after your attempt
Correct Answer

C. दो भिन्न अपरिमेय शून्यकTwo distinct irrational zeroes

Step 1

Concept

The simplified form is \(x^2-4x+2\), and (D=16-8=8). Since (8) is not a perfect square, the zeroes are irrational.

Step 2

Why this answer is correct

The correct answer is C. दो भिन्न अपरिमेय शून्यक / Two distinct irrational zeroes. The simplified form is \(x^2-4x+2\), and (D=16-8=8). Since (8) is not a perfect square, the zeroes are irrational.

Step 3

Exam Tip

सरल रूप \(x^2-4x+2\) है और (D=16-8=8) है। (8) पूर्ण वर्ग नहीं है, इसलिए शून्यक अपरिमेय हैं।

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Question Hard Mathematics Polynomials Irrational numbers and real numbers Class 10 Level 28

यदि (p(x)=x-2-8x+10) है, तो इसके शून्यक कौन से हैं?

If (p(x)=x-2-8x+10), what are its zeroes?

Explanation opens after your attempt
Correct Answer

A. \(4+\sqrt{6}\) और \(4-\sqrt{6}\)\(4+\sqrt{6}\) and \(4-\sqrt{6}\)

Step 1

Concept

By the formula, the zeroes are \(\frac{8\pm\sqrt{64-40}}{2}=4\pm\sqrt{6}\). Simplify the discriminant first.

Step 2

Why this answer is correct

The correct answer is A. \(4+\sqrt{6}\) और \(4-\sqrt{6}\) / \(4+\sqrt{6}\) and \(4-\sqrt{6}\). By the formula, the zeroes are \(\frac{8\pm\sqrt{64-40}}{2}=4\pm\sqrt{6}\). Simplify the discriminant first.

Step 3

Exam Tip

सूत्र से शून्यक \(\frac{8\pm\sqrt{64-40}}{2}=4\pm\sqrt{6}\) हैं। पहले विविक्तकर सरल करें।

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Question Hard Mathematics Polynomials Irrational numbers and real numbers Class 10 Level 28

यदि (p(x)=x-2-6x+4) है, तो उसके शून्यकों की प्रकृति क्या है?

If (p(x)=x-2-6x+4), what is the nature of its zeroes?

Explanation opens after your attempt
Correct Answer

C. दो भिन्न अपरिमेय शून्यकTwo distinct irrational zeroes

Step 1

Concept

The discriminant is (D=36-16=20), and (20) is not a perfect square. So the zeroes are real, distinct, and irrational.

Step 2

Why this answer is correct

The correct answer is C. दो भिन्न अपरिमेय शून्यक / Two distinct irrational zeroes. The discriminant is (D=36-16=20), and (20) is not a perfect square. So the zeroes are real, distinct, and irrational.

Step 3

Exam Tip

विविक्तकर (D=36-16=20) है और (20) पूर्ण वर्ग नहीं है। इसलिए शून्यक वास्तविक भिन्न और अपरिमेय हैं।

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Question Expert Mathematics Polynomials Geometrical meaning of the zeroes of a polynomial. Class 10 Level 23

यदि (p(x)=5x-2+20x+23) है, तो ग्राफ (x)-अक्ष के सापेक्ष कैसा होगा?

If (p(x)=5x-2+20x+23), how will the graph be with respect to the (x)-axis?

Explanation opens after your attempt
Correct Answer

C. नहीं काटेगाIt will not cut

Step 1

Concept

The discriminant is (400-460=-60), so there are no real zeroes. Tip: with negative discriminant a parabola does not meet the (x)-axis.

Step 2

Why this answer is correct

The correct answer is C. नहीं काटेगा / It will not cut. The discriminant is (400-460=-60), so there are no real zeroes. Tip: with negative discriminant a parabola does not meet the (x)-axis.

Step 3

Exam Tip

विविक्तकर (400-460=-60) है, इसलिए वास्तविक शून्यक नहीं हैं। टिप: ऋणात्मक विविक्तकर पर परवलय (x)-अक्ष से नहीं मिलता।

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Question Expert Mathematics Polynomials Geometrical meaning of the zeroes of a polynomial. Class 10 Level 23

यदि (p(x)=x-2+gx+g-2) और \(g\neq0\) है, तो ग्राफ (x)-अक्ष को क्यों नहीं काटेगा?

If (p(x)=x-2+gx+g-2) and \(g\neq0\), why will the graph not cut the (x)-axis?

Explanation opens after your attempt
Correct Answer

A. क्योंकि इसका विविक्तकर ऋणात्मक हैBecause its discriminant is negative

Step 1

Concept

The discriminant is \(g^2-4g^2=-3g^2<0\), so there are no real zeroes. Tip: a negative discriminant means no (x)-axis intersection.

Step 2

Why this answer is correct

The correct answer is A. क्योंकि इसका विविक्तकर ऋणात्मक है / Because its discriminant is negative. The discriminant is \(g^2-4g^2=-3g^2<0\), so there are no real zeroes. Tip: a negative discriminant means no (x)-axis intersection.

Step 3

Exam Tip

विविक्तकर \(g^2-4g^2=-3g^2<0\) है, इसलिए वास्तविक शून्यक नहीं हैं। टिप: ऋणात्मक विविक्तकर का अर्थ (x)-अक्ष कटान नहीं है।

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Question Expert Mathematics Polynomials Geometrical meaning of the zeroes of a polynomial. Class 10 Level 22

यदि (p(x)=4x-2+16x+21) है, तो ग्राफ (x)-अक्ष के सापेक्ष कैसा होगा?

If (p(x)=4x-2+16x+21), how will the graph be with respect to the (x)-axis?

Explanation opens after your attempt
Correct Answer

C. नहीं काटेगाIt will not cut

Step 1

Concept

The discriminant is (256-336=-80), so there are no real zeroes. Tip: with negative discriminant a parabola does not meet the (x)-axis.

Step 2

Why this answer is correct

The correct answer is C. नहीं काटेगा / It will not cut. The discriminant is (256-336=-80), so there are no real zeroes. Tip: with negative discriminant a parabola does not meet the (x)-axis.

Step 3

Exam Tip

विविक्तकर (256-336=-80) है, इसलिए वास्तविक शून्यक नहीं हैं। टिप: ऋणात्मक विविक्तकर पर परवलय (x)-अक्ष से नहीं मिलता।

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Question Expert Mathematics Polynomials Geometrical meaning of the zeroes of a polynomial. Class 10 Level 22

यदि (p(x)=x-2+fx+f-2) और \(f\neq0\) है, तो ग्राफ (x)-अक्ष को क्यों नहीं काटेगा?

If (p(x)=x-2+fx+f-2) and \(f\neq0\), why will the graph not cut the (x)-axis?

Explanation opens after your attempt
Correct Answer

A. क्योंकि इसका विविक्तकर ऋणात्मक हैBecause its discriminant is negative

Step 1

Concept

The discriminant is \(f^2-4f^2=-3f^2<0\), so there are no real zeroes. Tip: a negative discriminant means no (x)-axis intersection.

Step 2

Why this answer is correct

The correct answer is A. क्योंकि इसका विविक्तकर ऋणात्मक है / Because its discriminant is negative. The discriminant is \(f^2-4f^2=-3f^2<0\), so there are no real zeroes. Tip: a negative discriminant means no (x)-axis intersection.

Step 3

Exam Tip

विविक्तकर \(f^2-4f^2=-3f^2<0\) है, इसलिए वास्तविक शून्यक नहीं हैं। टिप: ऋणात्मक विविक्तकर का अर्थ (x)-अक्ष कटान नहीं है।

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Question Hard Mathematics Polynomials Geometrical meaning of the zeroes of a polynomial. Class 10 Level 24

यदि (p(x)=3x-2+12x+17) है तो ग्राफ (x)-अक्ष के सापेक्ष कैसा होगा?

If (p(x)=3x-2+12x+17), how will the graph be with respect to the (x)-axis?

Explanation opens after your attempt
Correct Answer

C. नहीं काटेगाIt will not cut

Step 1

Concept

The discriminant is (144-204=-60), so there are no real zeroes. Tip: with negative discriminant a parabola does not meet the (x)-axis.

Step 2

Why this answer is correct

The correct answer is C. नहीं काटेगा / It will not cut. The discriminant is (144-204=-60), so there are no real zeroes. Tip: with negative discriminant a parabola does not meet the (x)-axis.

Step 3

Exam Tip

विविक्तकर (144-204=-60) है इसलिए वास्तविक शून्यक नहीं हैं। टिप: ऋणात्मक विविक्तकर पर परवलय (x)-अक्ष से नहीं मिलता।

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Question Hard Mathematics Polynomials Geometrical meaning of the zeroes of a polynomial. Class 10 Level 24

यदि (p(x)=x-2+dx+d-2) और \(d\neq0\) है तो ग्राफ (x)-अक्ष को क्यों नहीं काटेगा?

If (p(x)=x-2+dx+d-2) and \(d\neq0\), why will the graph not cut the (x)-axis?

Explanation opens after your attempt
Correct Answer

A. क्योंकि इसका विविक्तकर ऋणात्मक हैBecause its discriminant is negative

Step 1

Concept

The discriminant is \(d^2-4d^2=-3d^2<0\), so there are no real zeroes. Tip: a negative discriminant means no (x)-axis intersection.

Step 2

Why this answer is correct

The correct answer is A. क्योंकि इसका विविक्तकर ऋणात्मक है / Because its discriminant is negative. The discriminant is \(d^2-4d^2=-3d^2<0\), so there are no real zeroes. Tip: a negative discriminant means no (x)-axis intersection.

Step 3

Exam Tip

विविक्तकर \(d^2-4d^2=-3d^2<0\) है इसलिए वास्तविक शून्यक नहीं हैं। टिप: ऋणात्मक विविक्तकर का अर्थ (x)-अक्ष कटान नहीं है।

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Question Hard Mathematics Polynomials Geometrical meaning of the zeroes of a polynomial. Class 10 Level 23

यदि (p(x)=2x-2+8x+11) है, तो ग्राफ (x)-अक्ष के सापेक्ष कैसा होगा?

If (p(x)=2x-2+8x+11), how will the graph be with respect to the (x)-axis?

Explanation opens after your attempt
Correct Answer

C. नहीं काटेगाIt will not cut

Step 1

Concept

The discriminant is (64-88=-24), so there are no real zeroes. Tip: with negative discriminant a parabola does not meet the (x)-axis.

Step 2

Why this answer is correct

The correct answer is C. नहीं काटेगा / It will not cut. The discriminant is (64-88=-24), so there are no real zeroes. Tip: with negative discriminant a parabola does not meet the (x)-axis.

Step 3

Exam Tip

विविक्तकर (64-88=-24) है, इसलिए वास्तविक शून्यक नहीं हैं। टिप: ऋणात्मक विविक्तकर पर परवलय (x)-अक्ष से नहीं मिलता।

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Question Hard Mathematics Polynomials Geometrical meaning of the zeroes of a polynomial. Class 10 Level 23

यदि (p(x)=x-2+cx+c-2) और \(c\neq0\), तो ग्राफ (x)-अक्ष को क्यों नहीं काटेगा?

If (p(x)=x-2+cx+c-2) and \(c\neq0\), why will the graph not cut the (x)-axis?

Explanation opens after your attempt
Correct Answer

A. क्योंकि इसका विविक्तकर ऋणात्मक हैBecause its discriminant is negative

Step 1

Concept

The discriminant is \(c^2-4c^2=-3c^2<0\), so there are no real zeroes. Tip: a negative discriminant means no (x)-axis intersection.

Step 2

Why this answer is correct

The correct answer is A. क्योंकि इसका विविक्तकर ऋणात्मक है / Because its discriminant is negative. The discriminant is \(c^2-4c^2=-3c^2<0\), so there are no real zeroes. Tip: a negative discriminant means no (x)-axis intersection.

Step 3

Exam Tip

विविक्तकर \(c^2-4c^2=-3c^2<0\) है, इसलिए वास्तविक शून्यक नहीं हैं। टिप: ऋणात्मक विविक्तकर का अर्थ (x)-अक्ष कटान नहीं है।

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