问题
解答题
化简: (1)
(2)1-
|
答案
(1)原式=
=x2-4x+4 x-2
=x-2;(x-2)2 x-2
(2)原式=1-
÷a-1 a
=1-a2-1 a(a+2)
•a-1 a
=1-a(a+2) (a+1)(a-1)
=-a+2 a+1
.1 a+1
化简: (1)
(2)1-
|
(1)原式=
=x2-4x+4 x-2
=x-2;(x-2)2 x-2
(2)原式=1-
÷a-1 a
=1-a2-1 a(a+2)
•a-1 a
=1-a(a+2) (a+1)(a-1)
=-a+2 a+1
.1 a+1