\(x^2+2x+1-y^2+4y-4\) का सही गुणनखंडन कौन सा है?
Which is the correct factorisation of \(x^2+2x+1-y^2+4y-4\)?
Explanation opens after your attempt
A. ((x+1-y+2)(x+1+y-2))
Concept
First identify (x-2+2x+1=(x+1)2) and (y-2-4y+4=(y-2)2). Then use difference of squares.
Why this answer is correct
The correct answer is A. ((x+1-y+2)(x+1+y-2)). First identify (x-2+2x+1=(x+1)2) and (y-2-4y+4=(y-2)2). Then use difference of squares.
Exam Tip
पहले (x-2+2x+1=(x+1)2) और (y-2-4y+4=(y-2)2) पहचानें। फिर वर्गों के अंतर का प्रयोग करें।
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