题目内容
化简分式(x-
)(y-
)=______.
| y2 |
| x |
| x2 |
| y |
原式=(
-
)(
-
)
=(
)×(
)
=
.
故答案为
.
| x2 |
| x |
| y2 |
| x |
| y2 |
| y |
| x2 |
| y |
=(
| x2-y2 |
| x |
| y2-x2 |
| y |
=
| -x4-y4+2x2y2 |
| xy |
故答案为
| -x4-y4+2x2y2 |
| xy |
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