问题
解答题
先化简,再求值:(x+1-
|
答案
原式=
•x2-1-3 x-1 x-1 (x-2)2
=
•(x+2)(x-2) x-1 x-1 (x-2)2
=
,x+2 x-2
当x=3时,原式=
=5.3+2 3-2
先化简,再求值:(x+1-
|
原式=
•x2-1-3 x-1 x-1 (x-2)2
=
•(x+2)(x-2) x-1 x-1 (x-2)2
=
,x+2 x-2
当x=3时,原式=
=5.3+2 3-2