Class 9 Mathematics - MIX - Squares and Square Roots Easy Quiz

Mathematics MIX Squares and Square Roots Easy Class 9 Level 2

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Question 1/1 Easy Mathematics MIX Squares and Square Roots Class 9 Level 2

\(25a^2\) किस व्यंजक का वर्ग है?

Which expression has \(25a^2\) as its square?

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Correct Answer

A. \(5a\)

Explanation

Simple Explanation

क्योंकि \((5a)^2=5^2\times a^2=25a^2\), इसलिए सही उत्तर \(5a\) है। विकल्प \(25a\) का वर्ग \(625a^2\) और \(5a^2\) का वर्ग \(25a^4\) होगा। परीक्षा-युक्ति: किसी पूर्ण वर्ग एकपदी का वर्गमूल निकालते समय गुणांक का वर्गमूल और चर की घात का आधा लें। / Since \((5a)^2=5^2\times a^2=25a^2\), the correct expression is \(5a\). The square of \(25a\) is \(625a^2\), while the square of \(5a^2\) is \(25a^4\). Exam tip: to find the square root of a perfect-square monomial, take the square root of the coefficient and halve the exponent of each variable.

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