问题
解答题
(1)化简:8x-[4x-2(x-1)+3(3x-2) (2)化简求值:2(a2b+ab2)-3(a2b-1)-(2ab2+1),其中a=-2,b=
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答案
(1)原式=8x-4x+2x-2-9x+6=-3x+4;
(2)原式=2a2b+2ab2-3a2b+3-2ab2-1=-a2b+2,
当a=-2,b=
时,原式=-2+2=0.1 2
(1)化简:8x-[4x-2(x-1)+3(3x-2) (2)化简求值:2(a2b+ab2)-3(a2b-1)-(2ab2+1),其中a=-2,b=
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(1)原式=8x-4x+2x-2-9x+6=-3x+4;
(2)原式=2a2b+2ab2-3a2b+3-2ab2-1=-a2b+2,
当a=-2,b=
时,原式=-2+2=0.1 2