问题
解答题
计算 (1)(3
(2)(1-
|
答案
(1)原式=(3
+42
)(33
-42
)3
=(3
)2-(42
)23
=18-48
=-30;
(2)原式=(1-
)2-3
+12(
-1)3 (
+1)(3
-1)3
=(1-
)2-(3
-1)+13
=1+3-2
-3
+1+13
=6-3
.3
计算 (1)(3
(2)(1-
|
(1)原式=(3
+42
)(33
-42
)3
=(3
)2-(42
)23
=18-48
=-30;
(2)原式=(1-
)2-3
+12(
-1)3 (
+1)(3
-1)3
=(1-
)2-(3
-1)+13
=1+3-2
-3
+1+13
=6-3
.3