题目内容
计算:(
+
)÷
=______.
x |
x-y |
y |
y-x |
xy |
x-y |
原式=(
-
)•
=
•
=
.
故答案为
.
x |
x-y |
y |
x-y |
x-y |
xy |
=
x-y |
x-y |
x-y |
xy |
=
x-y |
xy |
故答案为
x-y |
xy |
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题目内容
x |
x-y |
y |
y-x |
xy |
x-y |
x |
x-y |
y |
x-y |
x-y |
xy |
x-y |
x-y |
x-y |
xy |
x-y |
xy |
x-y |
xy |