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分解因式:(x+y)^+4(x-y)^-4(x^-y^)
人气:129 ℃ 时间:2020-10-01 22:50:28
解答
(x+y)^+4(x-y)^-4(x^-y^)
=(x+y)²-4(x+y)(x-y)+4(x-y)²
=(x+y-2x+2y)²
=(3y-x)²
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