问题
计算题
化简:(1)2a﹣5b﹣3a+b;
(2)2x+(5x﹣3y)﹣2(3x+y);
(3)5ab2﹣3[2a2b﹣2(a2b﹣2ab2)]
答案
解:(1)原式=﹣a﹣4b;
(2)原式=2x+5x﹣3y﹣6x﹣2y=x﹣5y;
(3)原式=5ab2﹣3[2a2b﹣2a2b+4ab2]
=5ab2﹣6a2b+6a2b﹣12ab2
=﹣7ab2.
化简:(1)2a﹣5b﹣3a+b;
(2)2x+(5x﹣3y)﹣2(3x+y);
(3)5ab2﹣3[2a2b﹣2(a2b﹣2ab2)]
解:(1)原式=﹣a﹣4b;
(2)原式=2x+5x﹣3y﹣6x﹣2y=x﹣5y;
(3)原式=5ab2﹣3[2a2b﹣2a2b+4ab2]
=5ab2﹣6a2b+6a2b﹣12ab2
=﹣7ab2.