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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