Concept-wise Practice

root-verification MCQ Questions for Class 10

root-verification se related questions ko ek jagah revise karein. Har question me bilingual content, answer feedback aur explanation available hai.

Practice Questions

10 questions tagged with root-verification.

(x-2-(a+8)x+8a=0) के बारे में कौन-सा कथन हमेशा सही है?

Which statement is always correct about (x-2-(a+8)x+8a=0)?

Explanation opens after your attempt
Correct Answer

A. (8) हमेशा एक जड़ है(8) is always one root

Step 1

Concept

Putting (x=8) gives (64-8(a+8)+8a=0). Hence (8) is always one root and the other root is (a).

Step 2

Why this answer is correct

The correct answer is A. (8) हमेशा एक जड़ है / (8) is always one root. Putting (x=8) gives (64-8(a+8)+8a=0). Hence (8) is always one root and the other root is (a).

Step 3

Exam Tip

(x=8) रखने पर (64-8(a+8)+8a=0) मिलता है। इसलिए (8) हमेशा एक जड़ है और दूसरी जड़ (a) है।

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(x-2-(a+6)x+6a=0) के लिए कौन-सा कथन हमेशा सत्य है?

Which statement is always true for (x-2-(a+6)x+6a=0)?

Explanation opens after your attempt
Correct Answer

B. (6) हमेशा जड़ है(6) is always a root

Step 1

Concept

Putting (x=6) gives (36-6(a+6)+6a=0). Hence (6) is always one root and the other root is (a).

Step 2

Why this answer is correct

The correct answer is B. (6) हमेशा जड़ है / (6) is always a root. Putting (x=6) gives (36-6(a+6)+6a=0). Hence (6) is always one root and the other root is (a).

Step 3

Exam Tip

(x=6) रखने पर (36-6(a+6)+6a=0) मिलता है। इसलिए (6) हमेशा एक जड़ है और दूसरी जड़ (a) है।

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(x-2-(a+4)x+4a=0) के लिए कौन-सा कथन हमेशा सत्य है?

Which statement is always true for (x-2-(a+4)x+4a=0)?

Explanation opens after your attempt
Correct Answer

A. (4) हमेशा एक जड़ है(4) is always a root

Step 1

Concept

Putting (x=4) gives (16-4(a+4)+4a=0). Hence (4) is always one root and the other root is (a).

Step 2

Why this answer is correct

The correct answer is A. (4) हमेशा एक जड़ है / (4) is always a root. Putting (x=4) gives (16-4(a+4)+4a=0). Hence (4) is always one root and the other root is (a).

Step 3

Exam Tip

(x=4) रखने पर (16-4(a+4)+4a=0) मिलता है। अतः (4) हमेशा एक जड़ है और दूसरी जड़ (a) होती है।

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यदि (x=0), \(ax^2+bx+c=0\) की जड़ है, तो कौन-सी शर्त निश्चित रूप से सही है?

If (x=0) is a root of \(ax^2+bx+c=0\), which condition must be true?

Explanation opens after your attempt
Correct Answer

A. (c=0)

Step 1

Concept

Putting (x=0) gives (c=0). Thus the direct condition for zero to be a root is (c=0).

Step 2

Why this answer is correct

The correct answer is A. (c=0). Putting (x=0) gives (c=0). Thus the direct condition for zero to be a root is (c=0).

Step 3

Exam Tip

(x=0) रखने पर समीकरण (c=0) बनता है। इसलिए शून्य जड़ होने की सीधी शर्त (c=0) है।

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(x-2-(a+3)x+3a=0) के बारे में कौन-सा कथन हमेशा सही है?

Which statement is always true about (x-2-(a+3)x+3a=0)?

Explanation opens after your attempt
Correct Answer

A. (3) हमेशा एक जड़ है(3) is always a root

Step 1

Concept

Putting (x=3) gives (9-3(a+3)+3a=0). Hence (3) is always one root, and the other root is (a).

Step 2

Why this answer is correct

The correct answer is A. (3) हमेशा एक जड़ है / (3) is always a root. Putting (x=3) gives (9-3(a+3)+3a=0). Hence (3) is always one root, and the other root is (a).

Step 3

Exam Tip

(x=3) रखने पर (9-3(a+3)+3a=0) मिलता है। इसलिए (3) हमेशा एक जड़ है और दूसरी जड़ (a) होती है।

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यदि (x=2), \(kx^2-6x+4=0\) की जड़ है, तो (k) का मान क्या है?

If (x=2) is a root of \(kx^2-6x+4=0\), what is (k)?

Explanation opens after your attempt
Correct Answer

B. (2)

Step 1

Concept

Putting (x=2), we get (4k-12+4=0). Hence (4k=8) and (k=2).

Step 2

Why this answer is correct

The correct answer is B. (2). Putting (x=2), we get (4k-12+4=0). Hence (4k=8) and (k=2).

Step 3

Exam Tip

(x=2) रखने पर (4k-12+4=0) मिलता है। इसलिए (4k=8) और (k=2)।

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यदि \(x^2-15x+56=0\), तो (x=7) रखने पर बायां पक्ष क्या बनेगा?

If \(x^2-15x+56=0\), what will the left side become when (x=7)?

Explanation opens after your attempt
Correct Answer

A. (0)

Step 1

Concept

\(7^2-15\cdot7+56=49-105+56=0\). If the left side becomes (0), the given value is a root.

Step 2

Why this answer is correct

The correct answer is A. (0). \(7^2-15\cdot7+56=49-105+56=0\). If the left side becomes (0), the given value is a root.

Step 3

Exam Tip

\(7^2-15\cdot7+56=49-105+56=0\) है। बायां पक्ष (0) हो तो दिया मान मूल है।

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यदि \(x^2-12x+35=0\), तो (x=5) रखने पर बायां पक्ष क्या बनेगा?

If \(x^2-12x+35=0\), what will the left side become when (x=5)?

Explanation opens after your attempt
Correct Answer

A. (0)

Step 1

Concept

\(5^2-12\cdot5+35=25-60+35=0\). If the left side becomes (0), the given value is a root.

Step 2

Why this answer is correct

The correct answer is A. (0). \(5^2-12\cdot5+35=25-60+35=0\). If the left side becomes (0), the given value is a root.

Step 3

Exam Tip

\(5^2-12\cdot5+35=25-60+35=0\) है। बायां पक्ष (0) हो तो दिया मान मूल है।

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यदि \(x^2-9x+20=0\), तो (x=4) रखने पर बायां पक्ष क्या बनेगा?

If \(x^2-9x+20=0\), what will the left side become when (x=4)?

Explanation opens after your attempt
Correct Answer

A. (0)

Step 1

Concept

\(4^2-9\cdot4+20=16-36+20=0\). If the left side becomes (0), the given value is a root.

Step 2

Why this answer is correct

The correct answer is A. (0). \(4^2-9\cdot4+20=16-36+20=0\). If the left side becomes (0), the given value is a root.

Step 3

Exam Tip

\(4^2-9\cdot4+20=16-36+20=0\) है। यदि बायां पक्ष (0) हो तो दिया मान मूल होता है।

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क्या (x=0) समीकरण \(x^2+5x=0\) का मूल है?

Is (x=0) a root of \(x^2+5x=0\)?

Explanation opens after your attempt
Correct Answer

A. हाँYes

Step 1

Concept

Putting (x=0) gives \(0^2+5\cdot0=0\). Substitution is the easiest way to check a root.

Step 2

Why this answer is correct

The correct answer is A. हाँ / Yes. Putting (x=0) gives \(0^2+5\cdot0=0\). Substitution is the easiest way to check a root.

Step 3

Exam Tip

(x=0) रखने पर \(0^2+5\cdot0=0\) मिलता है। मूल जांचने में प्रतिस्थापन सबसे आसान तरीका है।

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