问题
填空题
化简(
|
答案
原式=[
-(x+1)(x-1) (x-1)2
]•x-1 x+1 x-1 x
=
-x+1 x (x-1)2 x(x+1)
=(x+1)2-(x-1)2 x(x+1)
=4x x(x+1)
=
.4 x+1
故答案为:
.4 x+1
化简(
|
原式=[
-(x+1)(x-1) (x-1)2
]•x-1 x+1 x-1 x
=
-x+1 x (x-1)2 x(x+1)
=(x+1)2-(x-1)2 x(x+1)
=4x x(x+1)
=
.4 x+1
故答案为:
.4 x+1