问题
解答题
计算或化简 (1)
|
答案
(1)原式=
;b2-a2 ab
(2)原式=1-
÷a-1 a (a+1)(a-1) a(a+2)
=1-
×a-1 a a(a+2) (a+1)(a-1)
=1-a+2 a+1
=-
.1 a+1
计算或化简 (1)
|
(1)原式=
;b2-a2 ab
(2)原式=1-
÷a-1 a (a+1)(a-1) a(a+2)
=1-
×a-1 a a(a+2) (a+1)(a-1)
=1-a+2 a+1
=-
.1 a+1