Concept-wise Practice

no-real-roots MCQ Questions for Class 10

no-real-roots se related questions ko ek jagah revise karein. Har question me bilingual content, answer feedback aur explanation available hai.

Practice Questions

171 questions tagged with no-real-roots.

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

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

Explanation opens after your attempt
Correct Answer

A. वास्तविक मूल नहींno real roots

Step 1

Concept

(D=12-4(1)(3)=-11<0). Hence real roots will not be obtained.

Step 2

Why this answer is correct

The correct answer is A. वास्तविक मूल नहीं / no real roots. (D=12-4(1)(3)=-11<0). Hence real roots will not be obtained.

Step 3

Exam Tip

(D=12-4(1)(3)=-11<0) है। इसलिए वास्तविक मूल नहीं मिलेंगे।

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यदि (D=-7) हो तो मूलों की प्रकृति क्या होगी?

If (D=-7), what will be the nature of roots?

Explanation opens after your attempt
Correct Answer

A. वास्तविक मूल नहींno real roots

Step 1

Concept

(-7<0), so there will be no real roots. Never treat negative (D) as equal roots.

Step 2

Why this answer is correct

The correct answer is A. वास्तविक मूल नहीं / no real roots. (-7<0), so there will be no real roots. Never treat negative (D) as equal roots.

Step 3

Exam Tip

(-7<0) है, इसलिए वास्तविक मूल नहीं होंगे। ऋणात्मक (D) को कभी समान मूल न मानें।

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किस समीकरण के वास्तविक मूल नहीं होंगे?

Which equation will have no real roots?

Explanation opens after your attempt
Correct Answer

A. \(x^2+3x+5=0\)

Step 1

Concept

For the first equation, (D=32-4(1)(5)=-11<0). A negative discriminant gives no real roots.

Step 2

Why this answer is correct

The correct answer is A. \(x^2+3x+5=0\). For the first equation, (D=32-4(1)(5)=-11<0). A negative discriminant gives no real roots.

Step 3

Exam Tip

पहले समीकरण में (D=32-4(1)(5)=-11<0) है। ऋणात्मक विविक्तकर वास्तविक मूल नहीं देता।

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समीकरण \(5x^2+x+1=0\) के लिए मूलों की प्रकृति चुनिए।

Choose the nature of roots for \(5x^2+x+1=0\).

Explanation opens after your attempt
Correct Answer

A. वास्तविक मूल नहींno real roots

Step 1

Concept

(D=12-4(5)(1)=-19<0). Therefore the equation has no real roots.

Step 2

Why this answer is correct

The correct answer is A. वास्तविक मूल नहीं / no real roots. (D=12-4(5)(1)=-19<0). Therefore the equation has no real roots.

Step 3

Exam Tip

(D=12-4(5)(1)=-19<0) है। इसलिए कोई वास्तविक मूल नहीं है।

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समीकरण \(x^2+2x+5=0\) के मूलों के बारे में सही कथन क्या है?

Which statement is correct about the roots of \(x^2+2x+5=0\)?

Explanation opens after your attempt
Correct Answer

A. वास्तविक मूल नहींno real roots

Step 1

Concept

Here (D=22-4(1)(5)=-16<0). So there are no real roots.

Step 2

Why this answer is correct

The correct answer is A. वास्तविक मूल नहीं / no real roots. Here (D=22-4(1)(5)=-16<0). So there are no real roots.

Step 3

Exam Tip

यहां (D=22-4(1)(5)=-16<0) है। इसलिए वास्तविक मूल नहीं हैं।

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\(7x^2-14x+19=0\) में पूर्ण वर्ग रूप कौनसा सही है?

Which completed square form is correct for \(7x^2-14x+19=0\)?

Explanation opens after your attempt
Correct Answer

A. (7(x-1)2+12=0)

Step 1

Concept

(7x-2-14x+19=7(x-1)2+12), so it cannot be zero for real (x). In exams, completed square form also shows the nature of roots.

Step 2

Why this answer is correct

The correct answer is A. (7(x-1)2+12=0). (7x-2-14x+19=7(x-1)2+12), so it cannot be zero for real (x). In exams, completed square form also shows the nature of roots.

Step 3

Exam Tip

(7x-2-14x+19=7(x-1)2+12), इसलिए यह वास्तविक (x) के लिए शून्य नहीं हो सकता। परीक्षा में पूर्ण वर्ग रूप से भी मूलों की प्रकृति दिखती है।

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\(7x^2-14x+19=0\) के वास्तविक मूलों के बारे में सही कथन क्या है?

What is the correct statement about real roots of \(7x^2-14x+19=0\)?

Explanation opens after your attempt
Correct Answer

A. वास्तविक मूल नहीं हैंThere are no real roots

Step 1

Concept

Here (D=(-14)2-4(7)(19)=-336<0), so there are no real roots. In exams, (D<0) means no real roots.

Step 2

Why this answer is correct

The correct answer is A. वास्तविक मूल नहीं हैं / There are no real roots. Here (D=(-14)2-4(7)(19)=-336<0), so there are no real roots. In exams, (D<0) means no real roots.

Step 3

Exam Tip

यहां (D=(-14)2-4(7)(19)=-336<0), इसलिए वास्तविक मूल नहीं हैं। परीक्षा में (D<0) का अर्थ वास्तविक मूल नहीं है।

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\(6x^2-12x+17=0\) में पूर्ण वर्ग रूप कौनसा सही है?

Which completed square form is correct for \(6x^2-12x+17=0\)?

Explanation opens after your attempt
Correct Answer

A. (6(x-1)2+11=0)

Step 1

Concept

(6x-2-12x+17=6(x-1)2+11), so it cannot be zero for real (x). In exams, completed square form also shows the nature of roots.

Step 2

Why this answer is correct

The correct answer is A. (6(x-1)2+11=0). (6x-2-12x+17=6(x-1)2+11), so it cannot be zero for real (x). In exams, completed square form also shows the nature of roots.

Step 3

Exam Tip

(6x-2-12x+17=6(x-1)2+11), इसलिए यह वास्तविक (x) के लिए शून्य नहीं हो सकता। परीक्षा में पूर्ण वर्ग रूप से भी मूलों की प्रकृति दिखती है।

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\(6x^2-12x+17=0\) के वास्तविक मूलों के बारे में सही कथन क्या है?

What is the correct statement about real roots of \(6x^2-12x+17=0\)?

Explanation opens after your attempt
Correct Answer

A. वास्तविक मूल नहीं हैंThere are no real roots

Step 1

Concept

Here (D=(-12)2-4(6)(17)=-264<0), so there are no real roots. In exams, (D<0) means no real roots.

Step 2

Why this answer is correct

The correct answer is A. वास्तविक मूल नहीं हैं / There are no real roots. Here (D=(-12)2-4(6)(17)=-264<0), so there are no real roots. In exams, (D<0) means no real roots.

Step 3

Exam Tip

यहां (D=(-12)2-4(6)(17)=-264<0), इसलिए वास्तविक मूल नहीं हैं। परीक्षा में (D<0) का अर्थ वास्तविक मूल नहीं है।

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\(5x^2-10x+13=0\) में पूर्ण वर्ग रूप कौनसा सही है?

Which completed square form is correct for \(5x^2-10x+13=0\)?

Explanation opens after your attempt
Correct Answer

A. (5(x-1)2+8=0)

Step 1

Concept

(5x-2-10x+13=5(x-1)2+8), so it cannot be zero for real (x). In exams, completed square form also shows the nature of roots.

Step 2

Why this answer is correct

The correct answer is A. (5(x-1)2+8=0). (5x-2-10x+13=5(x-1)2+8), so it cannot be zero for real (x). In exams, completed square form also shows the nature of roots.

Step 3

Exam Tip

(5x-2-10x+13=5(x-1)2+8), इसलिए यह वास्तविक (x) के लिए शून्य नहीं हो सकता। परीक्षा में पूर्ण वर्ग रूप से भी मूलों की प्रकृति दिखती है।

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\(5x^2-10x+13=0\) के वास्तविक मूलों के बारे में सही कथन क्या है?

What is the correct statement about real roots of \(5x^2-10x+13=0\)?

Explanation opens after your attempt
Correct Answer

A. वास्तविक मूल नहीं हैंThere are no real roots

Step 1

Concept

Here (D=(-10)2-4(5)(13)=-160<0), so there are no real roots. In exams, (D<0) means no real roots.

Step 2

Why this answer is correct

The correct answer is A. वास्तविक मूल नहीं हैं / There are no real roots. Here (D=(-10)2-4(5)(13)=-160<0), so there are no real roots. In exams, (D<0) means no real roots.

Step 3

Exam Tip

यहां (D=(-10)2-4(5)(13)=-160<0), इसलिए वास्तविक मूल नहीं हैं। परीक्षा में (D<0) का अर्थ वास्तविक मूल नहीं है।

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\(4x^2-8x+9=0\) में पूर्ण वर्ग रूप कौनसा सही है?

Which completed square form is correct for \(4x^2-8x+9=0\)?

Explanation opens after your attempt
Correct Answer

A. (4(x-1)2+5=0)

Step 1

Concept

(4x-2-8x+9=4(x-1)2+5), so it cannot be zero for real (x). In exams, completed square form also shows the nature of roots.

Step 2

Why this answer is correct

The correct answer is A. (4(x-1)2+5=0). (4x-2-8x+9=4(x-1)2+5), so it cannot be zero for real (x). In exams, completed square form also shows the nature of roots.

Step 3

Exam Tip

(4x-2-8x+9=4(x-1)2+5), इसलिए यह वास्तविक (x) के लिए शून्य नहीं हो सकता। परीक्षा में पूर्ण वर्ग रूप से भी मूलों की प्रकृति दिखती है।

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\(4x^2-8x+9=0\) के वास्तविक मूलों के बारे में सही कथन क्या है?

What is the correct statement about real roots of \(4x^2-8x+9=0\)?

Explanation opens after your attempt
Correct Answer

A. वास्तविक मूल नहीं हैंThere are no real roots

Step 1

Concept

Here (D=(-8)2-4(4)(9)=-80<0), so there are no real roots. In exams, (D<0) means no real roots.

Step 2

Why this answer is correct

The correct answer is A. वास्तविक मूल नहीं हैं / There are no real roots. Here (D=(-8)2-4(4)(9)=-80<0), so there are no real roots. In exams, (D<0) means no real roots.

Step 3

Exam Tip

यहां (D=(-8)2-4(4)(9)=-80<0), इसलिए वास्तविक मूल नहीं हैं। परीक्षा में (D<0) का अर्थ वास्तविक मूल नहीं है।

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\(3x^2-6x+7=0\) में पूर्ण वर्ग रूप कौनसा सही है?

Which completed square form is correct for \(3x^2-6x+7=0\)?

Explanation opens after your attempt
Correct Answer

A. (3(x-1)2+4=0)

Step 1

Concept

(3x-2-6x+7=3(x-1)2+4), so it cannot be zero for real (x). In exams, completed square form also shows the nature of real roots.

Step 2

Why this answer is correct

The correct answer is A. (3(x-1)2+4=0). (3x-2-6x+7=3(x-1)2+4), so it cannot be zero for real (x). In exams, completed square form also shows the nature of real roots.

Step 3

Exam Tip

(3x-2-6x+7=3(x-1)2+4), इसलिए यह वास्तविक (x) के लिए शून्य नहीं हो सकता। परीक्षा में पूर्ण वर्ग रूप से भी वास्तविक मूलों की प्रकृति दिखती है।

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\(3x^2-6x+7=0\) के वास्तविक मूलों के बारे में सही कथन क्या है?

What is the correct statement about real roots of \(3x^2-6x+7=0\)?

Explanation opens after your attempt
Correct Answer

A. वास्तविक मूल नहीं हैंThere are no real roots

Step 1

Concept

Here (D=(-6)2-4(3)(7)=-48<0), so there are no real roots. In exams, (D<0) means no real roots.

Step 2

Why this answer is correct

The correct answer is A. वास्तविक मूल नहीं हैं / There are no real roots. Here (D=(-6)2-4(3)(7)=-48<0), so there are no real roots. In exams, (D<0) means no real roots.

Step 3

Exam Tip

यहां (D=(-6)2-4(3)(7)=-48<0), इसलिए वास्तविक मूल नहीं हैं। परीक्षा में (D<0) का अर्थ वास्तविक मूल नहीं है।

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\(2x^2-4x+5=0\) में पूर्ण वर्ग रूप कौनसा सही है?

Which completed square form is correct for \(2x^2-4x+5=0\)?

Explanation opens after your attempt
Correct Answer

A. (2(x-1)2+3=0)

Step 1

Concept

(2x-2-4x+5=2(x-1)2+3), so it cannot be zero for real (x). In exams, completed square form also shows no real roots.

Step 2

Why this answer is correct

The correct answer is A. (2(x-1)2+3=0). (2x-2-4x+5=2(x-1)2+3), so it cannot be zero for real (x). In exams, completed square form also shows no real roots.

Step 3

Exam Tip

(2x-2-4x+5=2(x-1)2+3), इसलिए यह वास्तविक (x) के लिए शून्य नहीं हो सकता। परीक्षा में पूर्ण वर्ग रूप से भी no real roots दिखता है।

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\(2x^2-4x+5=0\) के वास्तविक मूलों के बारे में सही कथन क्या है?

What is the correct statement about real roots of \(2x^2-4x+5=0\)?

Explanation opens after your attempt
Correct Answer

A. वास्तविक मूल नहीं हैंThere are no real roots

Step 1

Concept

Here (D=(-4)2-4(2)(5)=-24<0), so there are no real roots. In exams, (D<0) means no real roots.

Step 2

Why this answer is correct

The correct answer is A. वास्तविक मूल नहीं हैं / There are no real roots. Here (D=(-4)2-4(2)(5)=-24<0), so there are no real roots. In exams, (D<0) means no real roots.

Step 3

Exam Tip

यहां (D=(-4)2-4(2)(5)=-24<0), इसलिए वास्तविक मूल नहीं हैं। परीक्षा में (D<0) का अर्थ no real roots है।

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\(x^2-6x+18=0\) में पूर्ण वर्ग बनाने पर कौनसा रूप बनेगा?

What form is obtained by completing the square in \(x^2-6x+18=0\)?

Explanation opens after your attempt
Correct Answer

A. ((x-3)2+9=0)

Step 1

Concept

(x-2-6x+18=(x-3)2+9), so no real roots are obtained. In exams, use completed square form to understand the nature of roots.

Step 2

Why this answer is correct

The correct answer is A. ((x-3)2+9=0). (x-2-6x+18=(x-3)2+9), so no real roots are obtained. In exams, use completed square form to understand the nature of roots.

Step 3

Exam Tip

(x-2-6x+18=(x-3)2+9), इसलिए वास्तविक मूल नहीं मिलते। परीक्षा में पूर्ण वर्ग रूप से भी मूलों की प्रकृति समझें।

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\(x^2-6x+18=0\) के वास्तविक मूलों के बारे में सही कथन क्या है?

What is the correct statement about real roots of \(x^2-6x+18=0\)?

Explanation opens after your attempt
Correct Answer

A. कोई वास्तविक मूल नहींNo real roots

Step 1

Concept

Here (D=(-6)2-4(1)(18)=-36<0), so there are no real roots. In exams, (D<0) means no real solution.

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)(18)=-36<0), so there are no real roots. In exams, (D<0) means no real solution.

Step 3

Exam Tip

यहां (D=(-6)2-4(1)(18)=-36<0), इसलिए वास्तविक मूल नहीं हैं। परीक्षा में (D<0) होने पर वास्तविक हल नहीं मिलता।

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\(x^2-4x+13=0\) में पूर्ण वर्ग बनाने पर कौनसा रूप बनेगा?

What form is obtained by completing the square in \(x^2-4x+13=0\)?

Explanation opens after your attempt
Correct Answer

A. ((x-2)2+9=0)

Step 1

Concept

(x-2-4x+13=(x-2)2+9), so no real roots are obtained. In exams, use completed square form to understand the nature of roots.

Step 2

Why this answer is correct

The correct answer is A. ((x-2)2+9=0). (x-2-4x+13=(x-2)2+9), so no real roots are obtained. In exams, use completed square form to understand the nature of roots.

Step 3

Exam Tip

(x-2-4x+13=(x-2)2+9), इसलिए वास्तविक मूल नहीं मिलते। परीक्षा में पूर्ण वर्ग रूप से भी मूलों की प्रकृति समझें।

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\(x^2-4x+13=0\) के वास्तविक मूलों के बारे में सही कथन क्या है?

What is the correct statement about real roots of \(x^2-4x+13=0\)?

Explanation opens after your attempt
Correct Answer

A. कोई वास्तविक मूल नहींNo real roots

Step 1

Concept

Here (D=(-4)2-4(1)(13)=-36<0), so there are no real roots. In exams, (D<0) means no real solution.

Step 2

Why this answer is correct

The correct answer is A. कोई वास्तविक मूल नहीं / No real roots. Here (D=(-4)2-4(1)(13)=-36<0), so there are no real roots. In exams, (D<0) means no real solution.

Step 3

Exam Tip

यहां (D=(-4)2-4(1)(13)=-36<0), इसलिए वास्तविक मूल नहीं हैं। परीक्षा में (D<0) होने पर वास्तविक हल नहीं मिलता।

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\(x^2-2x+5=0\) में पूर्ण वर्ग बनाने पर कौनसा रूप बनेगा?

What form is obtained by completing the square in \(x^2-2x+5=0\)?

Explanation opens after your attempt
Correct Answer

A. ((x-1)2+4=0)

Step 1

Concept

(x-2-2x+5=(x-1)2+4), so no real roots are obtained. In exams, the completed square form also shows the nature of roots.

Step 2

Why this answer is correct

The correct answer is A. ((x-1)2+4=0). (x-2-2x+5=(x-1)2+4), so no real roots are obtained. In exams, the completed square form also shows the nature of roots.

Step 3

Exam Tip

(x-2-2x+5=(x-1)2+4), इसलिए वास्तविक मूल नहीं मिलते। परीक्षा में पूर्ण वर्ग रूप से भी मूलों की प्रकृति समझ सकते हैं।

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\(x^2-2x+5=0\) के वास्तविक मूलों के बारे में सही कथन क्या है?

What is the correct statement about real roots of \(x^2-2x+5=0\)?

Explanation opens after your attempt
Correct Answer

A. कोई वास्तविक मूल नहींNo real roots

Step 1

Concept

Here (D=(-2)2-4(1)(5)=-16<0), so there are no real roots. In exams, (D<0) means no real solution.

Step 2

Why this answer is correct

The correct answer is A. कोई वास्तविक मूल नहीं / No real roots. Here (D=(-2)2-4(1)(5)=-16<0), so there are no real roots. In exams, (D<0) means no real solution.

Step 3

Exam Tip

यहां (D=(-2)2-4(1)(5)=-16<0), इसलिए वास्तविक मूल नहीं हैं। परीक्षा में (D<0) होने पर वास्तविक हल नहीं मिलता।

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\(x^2+36=0\) के वास्तविक मूलों के बारे में सही कथन क्या है?

What is the correct statement about the real roots of \(x^2+36=0\)?

Explanation opens after your attempt
Correct Answer

A. कोई वास्तविक मूल नहींNo real roots

Step 1

Concept

\(x^2=-36\) is not possible in real numbers. In exams, \(x^2\) is not negative for real (x).

Step 2

Why this answer is correct

The correct answer is A. कोई वास्तविक मूल नहीं / No real roots. \(x^2=-36\) is not possible in real numbers. In exams, \(x^2\) is not negative for real (x).

Step 3

Exam Tip

\(x^2=-36\) वास्तविक संख्याओं में संभव नहीं है। परीक्षा में \(x^2\) का मान वास्तविक (x) के लिए ऋणात्मक नहीं होता।

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यदि किसी द्विघात समीकरण में (D=-9) हो, तो कौनसा निष्कर्ष सही है?

If a quadratic equation has (D=-9), which conclusion is correct?

Explanation opens after your attempt
Correct Answer

A. वास्तविक मूल नहीं होंगेThere will be no real roots

Step 1

Concept

When (D<0), no real square root is obtained. In exams, remember the meaning of a negative discriminant.

Step 2

Why this answer is correct

The correct answer is A. वास्तविक मूल नहीं होंगे / There will be no real roots. When (D<0), no real square root is obtained. In exams, remember the meaning of a negative discriminant.

Step 3

Exam Tip

(D<0) होने पर वास्तविक वर्गमूल नहीं मिलता। परीक्षा में ऋणात्मक विविक्तकर का अर्थ याद रखें।

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\(x^2+25=0\) के वास्तविक मूलों के बारे में सही कथन क्या है?

What is the correct statement about the real roots of \(x^2+25=0\)?

Explanation opens after your attempt
Correct Answer

A. कोई वास्तविक मूल नहींNo real roots

Step 1

Concept

\(x^2=-25\) is not possible in real numbers. In exams, \(x^2\) is not negative for real (x).

Step 2

Why this answer is correct

The correct answer is A. कोई वास्तविक मूल नहीं / No real roots. \(x^2=-25\) is not possible in real numbers. In exams, \(x^2\) is not negative for real (x).

Step 3

Exam Tip

\(x^2=-25\) वास्तविक संख्याओं में संभव नहीं है। परीक्षा में \(x^2\) का मान वास्तविक (x) के लिए ऋणात्मक नहीं होता।

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यदि किसी द्विघात समीकरण में (D=-4) हो, तो कौनसा निष्कर्ष सही है?

If a quadratic equation has (D=-4), which conclusion is correct?

Explanation opens after your attempt
Correct Answer

A. वास्तविक मूल नहीं होंगेThere will be no real roots

Step 1

Concept

When (D<0), no real square root is obtained. In exams, remember the meaning of a negative discriminant.

Step 2

Why this answer is correct

The correct answer is A. वास्तविक मूल नहीं होंगे / There will be no real roots. When (D<0), no real square root is obtained. In exams, remember the meaning of a negative discriminant.

Step 3

Exam Tip

(D<0) होने पर वास्तविक वर्गमूल नहीं मिलता। परीक्षा में ऋणात्मक विविक्तकर का अर्थ याद रखें।

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\(x^2+9=0\) के वास्तविक मूलों के बारे में सही कथन क्या है?

What is the correct statement about the real roots of \(x^2+9=0\)?

Explanation opens after your attempt
Correct Answer

A. कोई वास्तविक मूल नहींNo real roots

Step 1

Concept

\(x^2=-9\) gives no solution in real numbers. In exams, remember that \(x^2\) cannot be negative for real (x).

Step 2

Why this answer is correct

The correct answer is A. कोई वास्तविक मूल नहीं / No real roots. \(x^2=-9\) gives no solution in real numbers. In exams, remember that \(x^2\) cannot be negative for real (x).

Step 3

Exam Tip

\(x^2=-9\) से वास्तविक संख्या में हल नहीं मिलता। परीक्षा में \(x^2\) ऋणात्मक नहीं हो सकता यह याद रखें।

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(x-2-2x+(p+3)=0) की वास्तविक जड़ें न हों, इसके लिए (p) पर सही शर्त क्या है?

For (x-2-2x+(p+3)=0) to have no real roots, what is the correct condition on (p)?

Explanation opens after your attempt
Correct Answer

A. (p>-2)

Step 1

Concept

For no real roots, (D<0) is required. Here (D=-4(p+2)), so (p>-2).

Step 2

Why this answer is correct

The correct answer is A. (p>-2). For no real roots, (D<0) is required. Here (D=-4(p+2)), so (p>-2).

Step 3

Exam Tip

वास्तविक जड़ें न होने के लिए (D<0) चाहिए। यहाँ (D=-4(p+2)), इसलिए (p>-2) है।

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\(5x^2-2x+1=0\) की जड़ों के बारे में सही कथन कौन-सा है?

Which statement is correct about the roots of \(5x^2-2x+1=0\)?

Explanation opens after your attempt
Correct Answer

C. वास्तविक जड़ें नहींNo real roots

Step 1

Concept

Here (D=(-2)2-4(5)(1)=-16<0). Therefore the equation has no real roots.

Step 2

Why this answer is correct

The correct answer is C. वास्तविक जड़ें नहीं / No real roots. Here (D=(-2)2-4(5)(1)=-16<0). Therefore the equation has no real roots.

Step 3

Exam Tip

यहाँ (D=(-2)2-4(5)(1)=-16<0) है। इसलिए इस समीकरण की वास्तविक जड़ें नहीं हैं।

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