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(x²+4y²)²-16x²y² 因式分解
x^4+x²y²+y^4 因式分解
人气:486 ℃ 时间:2020-05-21 07:14:23
解答
解
(x²+4y²)²-16x²y²
=(x²+4y²)²-(4xy)²
=[(x²+4y²-4xy][(x²+4y²+4xy]
=(x-2y)²(x+2y)²最后一步怎么得出的?完全平方(x²-4xy+4y²)=x²-2×x×2y+(2y)²=(x-2y)²
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