问题
解答题
计算:
(1)[(-x2y)3]2-(-xy2)
(2)-(a2b+4ab-2)+2(a2-3ab+2)
(3)[(x+1)(x+2)-2]÷x.
答案
(1)原式=x12y6•(-xy2)
=-x13y8;
(2)原式=-a2b-4ab+2+2a2-6ab+4
=-a2b+2ab+6+2a2;
(3)原式=(x2+3x)÷x
=x+3.
计算:
(1)[(-x2y)3]2-(-xy2)
(2)-(a2b+4ab-2)+2(a2-3ab+2)
(3)[(x+1)(x+2)-2]÷x.
(1)原式=x12y6•(-xy2)
=-x13y8;
(2)原式=-a2b-4ab+2+2a2-6ab+4
=-a2b+2ab+6+2a2;
(3)原式=(x2+3x)÷x
=x+3.