题目
若a、b满足(a−3)
提问时间:2020-10-01
答案
∵(a-3)2+|b+
|=0,
∴a-3=0,b+
=0,
∴a=3,b=-
,
又∵原式=3a2b-2ab2+2ab-3a2b-ab+3ab2=ab2+ab,
∴当a=3,b=-
时,原式=ab2+ab=3×(-
)2+3×(-
)=
-1=-
.
1 |
3 |
∴a-3=0,b+
1 |
3 |
∴a=3,b=-
1 |
3 |
又∵原式=3a2b-2ab2+2ab-3a2b-ab+3ab2=ab2+ab,
∴当a=3,b=-
1 |
3 |
1 |
3 |
1 |
3 |
1 |
3 |
2 |
3 |
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