题目内容
计算:(-
)2•(-
)3÷(
)2.
| x |
| y |
| y |
| x |
| 1 |
| xy |
原式=
•(-
)÷(
)
=-
•
•x2y2
=-xy3.
| x2 |
| y2 |
| y3 |
| x3 |
| 1 |
| x2y2 |
=-
| x2 |
| y2 |
| y3 |
| x3 |
=-xy3.
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题目内容
| x |
| y |
| y |
| x |
| 1 |
| xy |
| x2 |
| y2 |
| y3 |
| x3 |
| 1 |
| x2y2 |
| x2 |
| y2 |
| y3 |
| x3 |