问题
解答题
计算: (1)x(2-
(2)
|
答案
(1)原式=x•
+2x-1 x
•(x+2)(x-2)x x(x-2)
=2x-1+x+2
=3x+1;
(2)原式=1-x+2x (1-x)(1+x)
=
.1 1-x
计算: (1)x(2-
(2)
|
(1)原式=x•
+2x-1 x
•(x+2)(x-2)x x(x-2)
=2x-1+x+2
=3x+1;
(2)原式=1-x+2x (1-x)(1+x)
=
.1 1-x