问题
解答题
先化简,再求值:(
|
答案
原式=(
)÷3x+4-2x-2 (x+1)(x-1) x+2 (x-1)2
=
×x+2 (x+1)(x-1) (x-1)2 x+2
=
,x-1 x+1
当x=
时,原式=2
=3-2
-12
+12
.2
先化简,再求值:(
|
原式=(
)÷3x+4-2x-2 (x+1)(x-1) x+2 (x-1)2
=
×x+2 (x+1)(x-1) (x-1)2 x+2
=
,x-1 x+1
当x=
时,原式=2
=3-2
-12
+12
.2