题目内容
当x=
时,求
÷
的值.
| 1 |
| 5 |
| x2+2xy+y2 |
| x2-y2 |
| x2+xy |
| x-y |
原式=
×
=
,
当x=
时,原式=5.
| x+y |
| x-y |
| x-y |
| x(x+y) |
=
| 1 |
| x |
当x=
| 1 |
| 5 |
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题目内容
| 1 |
| 5 |
| x2+2xy+y2 |
| x2-y2 |
| x2+xy |
| x-y |
| x+y |
| x-y |
| x-y |
| x(x+y) |
| 1 |
| x |
| 1 |
| 5 |