问题
解答题
计算或化简: (1)
(2)(
|
答案
(1)原式=2
×2
+2-12 2
=2+2-1
=3;
(2)原式=(
-1 x-1
)(x+1)(x-1)1 x+1
=(x+1)-(x-1)
=2.
计算或化简: (1)
(2)(
|
(1)原式=2
×2
+2-12 2
=2+2-1
=3;
(2)原式=(
-1 x-1
)(x+1)(x-1)1 x+1
=(x+1)-(x-1)
=2.