\(x^4-81\) का सही गुणनखंड रूप कौन-सा है?
Which is the correct factorised form of \(x^4-81\)?
Explanation opens after your attempt
B. ((x-3)(x+3)\(x^2+9\))
Concept
First (x-4-81=\(x^2-9\)\(x^2+9\)), and \(x^2-9\) factors further. In exams, factor further wherever possible.
Why this answer is correct
The correct answer is B. ((x-3)(x+3)\(x^2+9\)). First (x-4-81=\(x^2-9\)\(x^2+9\)), and \(x^2-9\) factors further. In exams, factor further wherever possible.
Exam Tip
पहले (x-4-81=\(x^2-9\)\(x^2+9\)) और \(x^2-9\) फिर टूटता है। परीक्षा में जहाँ संभव हो वहाँ आगे भी गुणनखंड करें।
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