यदि (m-n=4) और \(m^2+n^2=34\), तो (mn) क्या है?

If (m-n=4) and \(m^2+n^2=34\), what is (mn)?

Author: Muft Shiksha Editorial Team Published:
Explanation opens after your attempt
Correct Answer

A. (9)correct value

Step 1

Concept

((m-n)2=m-2+n-2-2mn), so (16=34-2mn) and (mn=9). In exams pay attention to the sign.

Step 2

Why this answer is correct

The correct answer is A. (9) / correct value. ((m-n)2=m-2+n-2-2mn), so (16=34-2mn) and (mn=9). In exams pay attention to the sign.

Step 3

Exam Tip

((m-n)2=m-2+n-2-2mn), इसलिए (16=34-2mn) और (mn=9) है। परीक्षा में चिन्ह पर ध्यान दें।

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FAQs

Mathematics Answer, Explanation and Revision Hints

यदि (m-n=4) और \(m^2+n^2=34\), तो (mn) क्या है? / If (m-n=4) and \(m^2+n^2=34\), what is (mn)?

Correct Answer: A. (9) / correct value. Explanation: ((m-n)2=m-2+n-2-2mn), इसलिए (16=34-2mn) और (mn=9) है। परीक्षा में चिन्ह पर ध्यान दें। / ((m-n)2=m-2+n-2-2mn), so (16=34-2mn) and (mn=9). In exams pay attention to the sign.

Which concept should I revise for this Mathematics MCQ?

((m-n)2=m-2+n-2-2mn), so (16=34-2mn) and (mn=9). In exams pay attention to the sign.

What exam hint can help solve this Mathematics question?

((m-n)2=m-2+n-2-2mn), इसलिए (16=34-2mn) और (mn=9) है। परीक्षा में चिन्ह पर ध्यान दें।