1-3(X-Y)＋3(X-Y)²-(X-Y)3次方次方因式分解_数学解答

1-3(X-Y)＋3(X-Y)²-(X-Y)3次方次方因式分解

人气：181 ℃　时间：2019-09-29 00:31:24

解答

令a=x-y
原式=-(a³-1)+3a²-3a
=-(a-1)(a²+a+1)+3a(a-1)
=-(a-1)(a²+a+1-3a)
=-(a-1)(a²-2a+1)
=-(a-1)³
=-(x-y-1)³