题目内容
若(x+m)(x-3)=x2-nx-12,则m、n的值为 ( )
A.m=4,n=-1 | B.m=4,n=1 |
C.m=-4,n=1 | D.m=-4,n=-1 |
A
试题分析:由题意可知对等式前面因式分解,转化为一元二次方程,即可求得m,n,
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题目内容
A.m=4,n=-1 | B.m=4,n=1 |
C.m=-4,n=1 | D.m=-4,n=-1 |