问题
解答题
计算: (1)8-2×(-3)2+[(-2)×3]2; (2)
|
答案
(1)原式=8-2×9+(-6)2=8-18+36=26;
(2)原式=
-2 3
+3 8
-1 3 1 8
=(
+2 3
)+(-1 3
-3 8
)1 8
=1-1 2
=
.1 2
计算: (1)8-2×(-3)2+[(-2)×3]2; (2)
|
(1)原式=8-2×9+(-6)2=8-18+36=26;
(2)原式=
-2 3
+3 8
-1 3 1 8
=(
+2 3
)+(-1 3
-3 8
)1 8
=1-1 2
=
.1 2