\(4x^2-20xy+25y^2\) किसका पूर्ण वर्ग है?
\(4x^2-20xy+25y^2\) is the perfect square of what?
Explanation opens after your attempt
A. ((2x-5y)2)
Concept
(4x-2=(2x)2) and (25y-2=(5y)2). The middle term is negative so ((2x-5y)2) is correct.
Why this answer is correct
The correct answer is A. ((2x-5y)2). (4x-2=(2x)2) and (25y-2=(5y)2). The middle term is negative so ((2x-5y)2) is correct.
Exam Tip
(4x-2=(2x)2) और (25y-2=(5y)2) है। मध्य पद ऋण है इसलिए ((2x-5y)2) सही है।
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