Easy Mathematics Chapter 1: Real Numbers Class 10 Level 17

\(\sqrt{5}\) के प्रमाण में (a=5k) रखने पर \(a^2\) का सही मान क्या है?

In the proof of \(\sqrt{5}\), if (a=5k), what is the correct value of \(a^2\)?

Explanation opens after your attempt
Correct Answer

A. \(25k^2\)

Step 1

Concept

We write (a=5k).

Step 2

Why this answer is correct

Squaring gives (a-2=(5k)2=25k-2).

Step 3

Exam Tip

A small algebra mistake can spoil the whole proof. चरण 1: (a=5k) लिखते हैं। चरण 2: वर्ग करने पर (a-2=(5k)2=25k-2)। चरण 3: छोटे बीजगणितीय कदमों में गलती से पूरा प्रमाण बिगड़ सकता है।

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What is the correct answer to this Mathematics MCQ?

The correct answer is A. \(25k^2\).

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