问题
解答题
计算题: (1)(-2xy2)3 (2)(-2x)-(3x2y) (3)-(x2)3-x4-x2 (4)(-3)0+(-
(5)(3x2y-2x+1)(-2xy) (6)(x-3y)(x-
|
答案
(1)原式=-8x3y6;
(2)原式=-6x3y;
(3)原式=-x6-x6
=-2x6;
(4)原式=1+4÷2
=3;
(5)原式=-6x3y2+4x2y-2xy;
(6)原式=x2-
xy-3xy+1 2
y23 2
=x2-
xy+3 2
y2.3 2