题目内容
化简：(-
)2•(-
)3÷(-
)4的结果是______．
| x2 |
| y |
| y2 |
| x |
| y |
| x |
(-
)2•(-
)3÷(-
)4
=
•(-
)÷
=-
•
•
=-x5．
故答案为-x5．
| x2 |
| y |
| y2 |
| x |
| y |
| x |
=
| x4 |
| y2 |
| y6 |
| x3 |
| y4 |
| x4 |
=-
| x4 |
| y2 |
| y6 |
| x3 |
| x4 |
| y4 |
=-x5．
故答案为-x5．
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