题目内容
化简:
(1)a-(3a+b)+(a-5b)
(2)5abc-2a2b-[3abc-3(4ab2+a2b)].
(1)a-(3a+b)+(a-5b)
(2)5abc-2a2b-[3abc-3(4ab2+a2b)].
(1)原式=a-3a-b+a-5b=-a-6b;
(2)原式=5abc-2a2b-3abc+12ab2+3a2b=2abc+12ab2+a2b.
(2)原式=5abc-2a2b-3abc+12ab2+3a2b=2abc+12ab2+a2b.
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