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[(x-y)(x+y)]^3怎么解,只学到了积的乘方,
人气:106 ℃ 时间:2020-01-28 13:41:36
解答
[(x-y)(x+y)]^3=(x^2-y^2)^3=(x^4-y^4)(x^2-y^2)=x^6-x^4y^2-x^2y^4+y^6
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