(x-y)³+4(y-x) (x-y)²+4(x-y-1) 2(
(x-y)³+4(y-x)(x-y)²+4(x-y-1)2(x-1)²-18.三分之一x²+2x-9...
(x-y)³+4(y-x) (x-y)²+4(x-y-1)
2(x-1)²-18. 三分之一x²+2x-9 展开
2(x-1)²-18. 三分之一x²+2x-9 展开
1个回答
展开全部
(x-y)³+4(y-x)
=(x-y)³-4(x-y)
=(x-y)[(x-y)²-4]
=(x-y)(x-y+2)(x-y-2)
(x-y)²+4(x-y-1)
=(x-y)²+4(x-y)+4
=(x-y+2)²
2(x-1)²-18
=2[(x-1)²-9]
=2(x-1+3)(x-1-3)
=2(x+2)(x-4)
⅓x²+2x-9
=⅓(x²+6x-27)
=⅓(x-3)(x+9)
=(x-y)³-4(x-y)
=(x-y)[(x-y)²-4]
=(x-y)(x-y+2)(x-y-2)
(x-y)²+4(x-y-1)
=(x-y)²+4(x-y)+4
=(x-y+2)²
2(x-1)²-18
=2[(x-1)²-9]
=2(x-1+3)(x-1-3)
=2(x+2)(x-4)
⅓x²+2x-9
=⅓(x²+6x-27)
=⅓(x-3)(x+9)
本回答由网友推荐
已赞过
已踩过<
评论
收起
你对这个回答的评价是？
推荐律师服务：
若未解决您的问题，请您详细描述您的问题，通过百度律临进行免费专业咨询
