यदि \(x=\sqrt{21}+\sqrt{8}\) है तो \(x^2-29\) का मान क्या है?

If \(x=\sqrt{21}+\sqrt{8}\), what is the value of \(x^2-29\)?

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

C. \(2\sqrt{168}\)

Step 1

Concept

\(x^2=21+8+2\sqrt{168}=29+2\sqrt{168}\). So \(x^2-29=2\sqrt{168}\).

Step 2

Why this answer is correct

The correct answer is C. \(2\sqrt{168}\). \(x^2=21+8+2\sqrt{168}=29+2\sqrt{168}\). So \(x^2-29=2\sqrt{168}\).

Step 3

Exam Tip

\(x^2=21+8+2\sqrt{168}=29+2\sqrt{168}\) है। इसलिए \(x^2-29=2\sqrt{168}\) है।

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Mathematics Answer, Explanation and Revision Hints

यदि \(x=\sqrt{21}+\sqrt{8}\) है तो \(x^2-29\) का मान क्या है? / If \(x=\sqrt{21}+\sqrt{8}\), what is the value of \(x^2-29\)?

Correct Answer: C. \(2\sqrt{168}\). Explanation: \(x^2=21+8+2\sqrt{168}=29+2\sqrt{168}\) है। इसलिए \(x^2-29=2\sqrt{168}\) है। / \(x^2=21+8+2\sqrt{168}=29+2\sqrt{168}\). So \(x^2-29=2\sqrt{168}\).

Which concept should I revise for this Mathematics MCQ?

\(x^2=21+8+2\sqrt{168}=29+2\sqrt{168}\). So \(x^2-29=2\sqrt{168}\).

What exam hint can help solve this Mathematics question?

\(x^2=21+8+2\sqrt{168}=29+2\sqrt{168}\) है। इसलिए \(x^2-29=2\sqrt{168}\) है।