(x-y)的三次方×(x-y)的六次方等于多少
人气:138 ℃ 时间:2020-05-14 11:23:03
解答
解
(x-y)³×(x-y)^6
=(x-y)^(3+6)
=(x-y)^9
(x-y)^9是(x-y)的九次方
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