题目内容
已知(2a-1)2+|3b-1|=0,求5(3a2b-ab2)-(ab2+3a2b)的值.
∵(2a-1)2+|3b-1|=0,
∴2a-1=0,3b-1=0,即a=
,b=
,
则5(3a2b-ab2)-(ab2+3a2b)
=15a2b-5ab2-ab2-3a2b
=12a2b-6ab2
=1-
=
.
∴2a-1=0,3b-1=0,即a=
| 1 |
| 2 |
| 1 |
| 3 |
则5(3a2b-ab2)-(ab2+3a2b)
=15a2b-5ab2-ab2-3a2b
=12a2b-6ab2
=1-
| 1 |
| 3 |
=
| 2 |
| 3 |
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