(a-b)的n+2次方-(a-b)的n次方等于多少?
人气:436 ℃ 时间:2019-10-17 01:55:25
解答
分解因式题么?
原式=(a-b)^n · [(a-b)^2-1]
=(a-b)^n · (a-b+1) · (a-b-1)
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