问题
解答题
化简
(1)-x+2(x-2)-(3x+5)
(2)3a2b-2[ab2-2(a2b-2ab2)].
答案
(1)原式=-x+2x-4-3x-5=-2x-9;
(2)原式=3a2b-2ab2+4a2b-4ab2=7a2b-6ab2.
化简
(1)-x+2(x-2)-(3x+5)
(2)3a2b-2[ab2-2(a2b-2ab2)].
(1)原式=-x+2x-4-3x-5=-2x-9;
(2)原式=3a2b-2ab2+4a2b-4ab2=7a2b-6ab2.