题目内容
(1)
=
(2)
=
.
| 9mn2 |
| 36n3 |
| m |
| () |
(2)
| x2+2xy+y2 |
| x2-y2 |
| x+y |
| () |
(1)
=
;
(2)
=
=
.
故答案为:4n,x-y.
| 9mn2 |
| 36n3 |
| m |
| 4n |
(2)
| x2+2xy+y2 |
| x2-y2 |
=
| (x+y)2 |
| (x+y)(x-y) |
=
| x+y |
| x-y |
故答案为:4n,x-y.
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