题目内容
计算题:
(1)(﹣2xy2)3
(2)(﹣2x)·(3x2y)
(3)﹣(x2)3﹣x4·x2
(4)
(5)(3x2y﹣2x+1)(﹣2xy)
(6)
.
(1)(﹣2xy2)3
(2)(﹣2x)·(3x2y)
(3)﹣(x2)3﹣x4·x2
(4)
(5)(3x2y﹣2x+1)(﹣2xy)
(6)
解:(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+
y2=x2﹣
xy+
y2.
(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﹣
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