问题:
(2x+1)(2x-3)-(x+3)(5x+2)=-x 2+6x+m,则m为
A.-21x-3
B.-27x-3
C.-27x-9
D.-27x+9
(2x+1)(2x-3)-(x+3)(5x+2)=-x 2+6x+m,则m为
A.-21x-3
B.-27x-3
C.-27x-9
D.-27x+9
A.-21x-3
B.-27x-3
C.-27x-9
D.-27x+9
参考答案: