问题
解答题
计算 (1)(-2ab2)3 (2)(3a2b-ab2)÷
(3)
(4)|
|
答案
(1)(-2ab2)3=(-2)3a3(b2)3=-8a3b6;
(2)原式=3a2b÷
ab-ab2÷1 2
ab=6a-2b; 1 2
(3)原式=3-1=2;
(4)原式=
-3
+22
=2
+3
.2
计算 (1)(-2ab2)3 (2)(3a2b-ab2)÷
(3)
(4)|
|
(1)(-2ab2)3=(-2)3a3(b2)3=-8a3b6;
(2)原式=3a2b÷
ab-ab2÷1 2
ab=6a-2b; 1 2
(3)原式=3-1=2;
(4)原式=
-3
+22
=2
+3
.2