题目内容
分解因式及化简
(1)x3y-2x2y2+xy3
(2)a2(a-b)+4b2(b-a)
(3)
-
+
(4)
+
÷
.
(1)x3y-2x2y2+xy3
(2)a2(a-b)+4b2(b-a)
(3)
| 3 |
| x+2 |
| 1 |
| x-2 |
| 2x |
| x2-4 |
(4)
| 1 |
| x+1 |
| x2-x |
| x2-2x-3 |
| x |
| x-3 |
(1)原式=xy(x2-2xy+y2)=xy(x-y)2;
(2)原式=(a-b)(a2-4b2)=(a-b)(a+2b)(a-2b);
(3)原式=
=
=
;
(4)原式=
+
•
=
=
.
(2)原式=(a-b)(a2-4b2)=(a-b)(a+2b)(a-2b);
(3)原式=
| 3(x-2)-(x+2)+2x |
| (x+2)(x-2) |
| 4(x-2) |
| (x+2)(x-2) |
| 4 |
| x+2 |
(4)原式=
| 1 |
| x+1 |
| x(x-1) |
| (x-3)(x+1) |
| x-3 |
| x |
| 1+x-1 |
| x+1 |
| x |
| x+1 |
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