8a^3b^2-2a
问题描述:
8a^3b^2-2a
答
原式=2a(4a^2b^2-1)
=2a(2ab+1)(2ab-1)(x-y)^2-4(x-y)+4这么做原式=(x-y-2)2(a+b)^2-8(a+b)(a-b)+16(a-b)^2咋么做原式=[a+b-4(a-b)]^2不再继续回答,请及时采纳,有事采纳后再问吧!谢谢