\(x^2-4x-y^2+4\) को गुणनखंडित करने पर क्या मिलेगा?
What is obtained by factorising \(x^2-4x-y^2+4\)?
Explanation opens after your attempt
A. ((x-2-y)(x-2+y))
Concept
Since (x-2-4x+4=(x-2)2), the expression becomes ((x-2)2-y-2). Exam tip: use (+4) to form a perfect square.
Why this answer is correct
The correct answer is A. ((x-2-y)(x-2+y)). Since (x-2-4x+4=(x-2)2), the expression becomes ((x-2)2-y-2). Exam tip: use (+4) to form a perfect square.
Exam Tip
(x-2-4x+4=(x-2)2), इसलिए expression ((x-2)2-y-2) बनती है। परीक्षा में (+4) को पूर्ण वर्ग बनाने में उपयोग करें।
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