Hard Mathematics Polynomials Class 10 Level 25

कौन सा विकल्प \(\sqrt{45}+\sqrt{80}-\sqrt{125}\) की प्रकृति सही बताता है?

Which option correctly describes the nature of \(\sqrt{45}+\sqrt{80}-\sqrt{125}\)?

Explanation opens after your attempt
Correct Answer

A. अपरिमेय संख्याIrrational number

Step 1

Concept

The expression becomes \(3\sqrt{5}+4\sqrt{5}-5\sqrt{5}=2\sqrt{5}\). \(2\sqrt{5}\) is irrational.

Step 2

Why this answer is correct

The correct answer is A. अपरिमेय संख्या / Irrational number. The expression becomes \(3\sqrt{5}+4\sqrt{5}-5\sqrt{5}=2\sqrt{5}\). \(2\sqrt{5}\) is irrational.

Step 3

Exam Tip

अभिव्यक्ति \(3\sqrt{5}+4\sqrt{5}-5\sqrt{5}=2\sqrt{5}\) बनती है। \(2\sqrt{5}\) अपरिमेय है।

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Mathematics Answer, Explanation and Revision Hints

कौन सा विकल्प \(\sqrt{45}+\sqrt{80}-\sqrt{125}\) की प्रकृति सही बताता है? / Which option correctly describes the nature of \(\sqrt{45}+\sqrt{80}-\sqrt{125}\)?

Correct Answer: A. अपरिमेय संख्या / Irrational number. Explanation: अभिव्यक्ति \(3\sqrt{5}+4\sqrt{5}-5\sqrt{5}=2\sqrt{5}\) बनती है। \(2\sqrt{5}\) अपरिमेय है। / The expression becomes \(3\sqrt{5}+4\sqrt{5}-5\sqrt{5}=2\sqrt{5}\). \(2\sqrt{5}\) is irrational.

Which concept should I revise for this Mathematics MCQ?

The expression becomes \(3\sqrt{5}+4\sqrt{5}-5\sqrt{5}=2\sqrt{5}\). \(2\sqrt{5}\) is irrational.

What exam hint can help solve this Mathematics question?

अभिव्यक्ति \(3\sqrt{5}+4\sqrt{5}-5\sqrt{5}=2\sqrt{5}\) बनती है। \(2\sqrt{5}\) अपरिमेय है।

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