यदि (f(x)=x-2-2x) और (g(x)=x-2+2x) हैं, तो ((fg)(x)) का सही गुणनखंडित रूप क्या है?
If (f(x)=x-2-2x) and (g(x)=x-2+2x), what is the correct factorized form of ((fg)(x))?
Explanation opens after your attempt
A. (x-2(x-2)(x+2))
Concept
(f=x(x-2)) and (g=x(x+2)), so (fg=x-2(x-2)(x+2)). Factoring first is better than long expansion.
Why this answer is correct
The correct answer is A. (x-2(x-2)(x+2)). (f=x(x-2)) and (g=x(x+2)), so (fg=x-2(x-2)(x+2)). Factoring first is better than long expansion.
Exam Tip
(f=x(x-2)) और (g=x(x+2)), इसलिए (fg=x-2(x-2)(x+2))। पहले गुणनखंड बनाना लंबे विस्तार से बेहतर है।
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