问题
解答题
计算下列各题. (1)3a2b(-4a2b+2ab2-ab); (2)-5x-(x2y-xy2)-2x2(
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答案
(1)原式=-12a4b2+6a3b3-3a3b2;
(2)原式=-5x3y+5x2y2-x3y-2x2y2
=-5x3y+3x2y2-x3y.
计算下列各题. (1)3a2b(-4a2b+2ab2-ab); (2)-5x-(x2y-xy2)-2x2(
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(1)原式=-12a4b2+6a3b3-3a3b2;
(2)原式=-5x3y+5x2y2-x3y-2x2y2
=-5x3y+3x2y2-x3y.