题目内容
化简
(1)
x2-2x2+(-
x2);
(2)5(3a2b-ab2)-(ab2-2a2b-1)
(1)
3 |
2 |
1 |
2 |
(2)5(3a2b-ab2)-(ab2-2a2b-1)
(1)原式=
x2-2x2-
x2=-x2;
(2)原式=15a2b-5ab2-ab2+2a2b+1=17a2b-6ab2+1.
3 |
2 |
1 |
2 |
(2)原式=15a2b-5ab2-ab2+2a2b+1=17a2b-6ab2+1.
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