问题
解答题
化简: (1)(8a-6b)-(4a-5b)+(3a-2b) (2)3x2y-2[
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答案
(1)原式=8a-6b-4a+5b+3a-2b=7a-3b;
(2)原式=3x2y-2(
x2y-x2y+1 2
x2)-2x2=3x2y+x2y-1 4
x2-2x2=4x2y-1 2
x2.5 2
化简: (1)(8a-6b)-(4a-5b)+(3a-2b) (2)3x2y-2[
|
(1)原式=8a-6b-4a+5b+3a-2b=7a-3b;
(2)原式=3x2y-2(
x2y-x2y+1 2
x2)-2x2=3x2y+x2y-1 4
x2-2x2=4x2y-1 2
x2.5 2