题目内容
若|x-3|+|y+2|=0,则6xy2-
xy2+
xy2的值为______.
| 5 |
| 3 |
| 2 |
| 3 |
∵|x-3|+|y+2|=0,
∴x-3=0,y+2=0,
x=3,y=-2,
∴6xy2-
xy2+
xy2
=(6-
+
)xy2
=5xy2,
当x=3,y=-2时,
原式=5xy2
=5×3×(-2)2
=15×4
=60,
故答案为:60.
∴x-3=0,y+2=0,
x=3,y=-2,
∴6xy2-
| 5 |
| 3 |
| 2 |
| 3 |
=(6-
| 5 |
| 3 |
| 2 |
| 3 |
=5xy2,
当x=3,y=-2时,
原式=5xy2
=5×3×(-2)2
=15×4
=60,
故答案为:60.
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