Hard Mathematics Polynomials 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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Mathematics Answer, Explanation and Revision Hints

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)?

Correct Answer: A. कथन सही है / The statement is true. Explanation: (r=3) पर (D=16-12=4) है, जो पूर्ण वर्ग है। इसलिए शून्यक परिमेय हैं। / For (r=3), (D=16-12=4), which is a perfect square. Therefore the zeroes are rational.

Which concept should I revise for this Mathematics MCQ?

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

What exam hint can help solve this Mathematics question?

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

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