问题
解答题
计算: (1)
(2)
|
答案
(1)原式=
-a a-b b a-b
=a-b a-b
=1;
(2)原式=
-1 x+2
•(x+1)2 x+2 1 x+1
=
-1 x+2 x+1 x+2
=-
.x x+2
计算: (1)
(2)
|
(1)原式=
-a a-b b a-b
=a-b a-b
=1;
(2)原式=
-1 x+2
•(x+1)2 x+2 1 x+1
=
-1 x+2 x+1 x+2
=-
.x x+2