问题
解答题
计算下列各题. (1)(x-y)-2(x-y)2-3(x-y)3; (2)-6a2b(x-y)3-
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答案
(1)(x-y)•2(x-y)2•3(x-y)3=6(x-y)6;
(2)-6a2b(x-y)3•
ab2(y-x)2=-6a2b(x-y)3•1 3
ab2(x-y)2=-2a3b3(x-y).1 3
计算下列各题. (1)(x-y)-2(x-y)2-3(x-y)3; (2)-6a2b(x-y)3-
|
(1)(x-y)•2(x-y)2•3(x-y)3=6(x-y)6;
(2)-6a2b(x-y)3•
ab2(y-x)2=-6a2b(x-y)3•1 3
ab2(x-y)2=-2a3b3(x-y).1 3