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Which is the correct factorised form of (x^4-81)?(x^4-81) का सही गुणनखंड रूप कौन-सा है?
Answer and explanationउत्तर और व्याख्या
Correct answer:सही उत्तर: ((x-3)(x+3)(x^2+9))((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.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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