题目内容
计算:
(1)
•(
);
(2)-3xy2÷
;
(3)
•
;
(4)
÷
.
(1)
| 3b2 |
| 4a2 |
| -a |
| 6b |
(2)-3xy2÷
| 6y2 |
| 5x |
(3)
| x2-x |
| x+1 |
| x2-1 |
| x2-2x+1 |
(4)
| 3ab+a2 |
| b2-a2 |
| a+3b |
| a-b |
(1)原式=
=-
;
(2)原式=-3xy2•
=-
;
(3)原式=
•
=x;
(4)原式=
•
=-
.
| -3ab2 |
| 24a2b |
=-
| b |
| 8a |
(2)原式=-3xy2•
| 5x |
| 6y2 |
=-
| 5x2 |
| 2 |
(3)原式=
| x(x-1) |
| (x+1) |
| (x+1)(x-1) |
| (x-1)2 |
=x;
(4)原式=
| a(a+3b) |
| -(a+b)(a-b) |
| a-b |
| a+3b |
=-
| a |
| a+b |
练习册系列答案
相关题目