问题描述:
计算:
(1)(x-2y)(x+3y)
(2)(x-1)(x2-x+1)
(3)(-2x+9y2)(
(1)(x-2y)(x+3y)
(2)(x-1)(x2-x+1)
(3)(-2x+9y2)(
1 |
3 |
问题解答:
我来补答展开全文阅读
问题描述:
1 |
3 |
问题解答:
我来补答