题目内容
计算:
(1)
•
(2)
÷
.
(1)
| x2+x |
| x-1 |
| x+1 |
| x3+2x2+x |
(2)
| x2-4y2 |
| x2+2xy+y2 |
| x+2y |
| x2+xy |
(1)原式=
•
=
;
(2)原式=
•
=
.
| x(x+1) |
| x-1 |
| x+1 |
| x(x+1)2 |
=
| 1 |
| x-1 |
(2)原式=
| (x+2y)(x-2y) |
| (x+y)2 |
| x(x+y) |
| x+2y |
=
| x(x-2y) |
| x+y |
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