问题:
计算:
(1)-2mn-(3m-1)
(2) -32-(
1
3
)-1+(3-π)0
(3)2(x+2)(x-1)-(x-1) 2
(4)
8x+5y=-9
4x+3y=-7
.
计算:
(1)-2mn-(3m-1)
(2) -32-(
)-1+(3-π)0
(3)2(x+2)(x-1)-(x-1) 2
(4)
.
(1)-2mn-(3m-1)
(2) -32-(
1 |
3 |
(3)2(x+2)(x-1)-(x-1) 2
(4)
|
参考答案: