问题
解答题
计算: (1)
(2)(
|
答案
(1)原式=2
+1-22
=2
-1;2
(2)原式=(
)2-23
+1-2+3 4(
-1)3 (
+1)(3
-1)3
=3-2
-1+2(3
-1)3
=3-2
-1+23
-23
=0.
计算: (1)
(2)(
|
(1)原式=2
+1-22
=2
-1;2
(2)原式=(
)2-23
+1-2+3 4(
-1)3 (
+1)(3
-1)3
=3-2
-1+2(3
-1)3
=3-2
-1+23
-23
=0.