Expert Mathematics Chapter 1: Real Numbers Class 10 Level 17

यदि \(\sqrt{5}\) को परिमेय मानकर \(\sqrt{5}=\frac{x}{y}\) लिखा जाए, तो \(x^2=5y^2\) तक पहुँचने के लिए कौन-सा बीजगणितीय कदम सही है?

If \(\sqrt{5}\) is assumed rational and written as \(\sqrt{5}=\frac{x}{y}\), which algebraic step correctly leads to \(x^2=5y^2\)?

Explanation opens after your attempt
Correct Answer

A. पहले वर्ग करें, फिर दोनों पक्षों को \(y^2\) से गुणा करेंFirst square, then multiply both sides by \(y^2\)

Step 1

Concept

Squaring \(\sqrt{5}=\frac{x}{y}\) gives \(5=\frac{x^2}{y^2}\).

Step 2

Why this answer is correct

Multiplying both sides by \(y^2\) gives \(x^2=5y^2\).

Step 3

Exam Tip

Remember the condition \(y\neq0\) while removing the denominator. चरण 1: \(\sqrt{5}=\frac{x}{y}\) को वर्ग करने पर \(5=\frac{x^2}{y^2}\) मिलता है। चरण 2: दोनों पक्षों को \(y^2\) से गुणा करने पर \(x^2=5y^2\) बनता है। चरण 3: हर हटाते समय \(y\neq0\) की शर्त ध्यान में रखें।

FAQs

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What is the correct answer to this Mathematics MCQ?

The correct answer is A. पहले वर्ग करें, फिर दोनों पक्षों को \(y^2\) से गुणा करें / First square, then multiply both sides by \(y^2\).

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