\(a^2-b^2+2bc-c^2\) का सही गुणनखंड कौन सा है?
Which is the correct factorisation of \(a^2-b^2+2bc-c^2\)?
Explanation opens after your attempt
A. ( (a-b+c)(a+b-c) )
Concept
Write \(-b^2+2bc-c^2\) as (-(b-c)2). Then apply difference of squares to (a-2-(b-c)2).
Why this answer is correct
The correct answer is A. ( (a-b+c)(a+b-c) ). Write \(-b^2+2bc-c^2\) as (-(b-c)2). Then apply difference of squares to (a-2-(b-c)2).
Exam Tip
\(-b^2+2bc-c^2\) को (-(b-c)2) लिखें। तब (a-2-(b-c)2) पर अंतर वर्ग लगाएं।
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