(x+1)(x-1)-(1-x)的因式分解 5
2个回答
展开全部
( x + 1 )( x - 1 ) - ( 1 - x )
= ( x + 1 )( x - 1 ) + ( x - 1 )
= ( x - 1 )( x + 1 + 1 )
= ( x - 1 )( x + 2 )
= x” + 2x - x - 2
= x” + x - 2
或者
= x” - 1 - 1 + x
= x” + x - 2
= x” - x + 2x - 2
= x( x - 1 ) + 2( x - 1 )
= ( x - 1 )( x + 2 )
= ( x + 1 )( x - 1 ) + ( x - 1 )
= ( x - 1 )( x + 1 + 1 )
= ( x - 1 )( x + 2 )
= x” + 2x - x - 2
= x” + x - 2
或者
= x” - 1 - 1 + x
= x” + x - 2
= x” - x + 2x - 2
= x( x - 1 ) + 2( x - 1 )
= ( x - 1 )( x + 2 )
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