1/2m^2+m-4怎么计算?还有一个 1/2m^2+5m+4

问题描述:

1/2m^2+m-4怎么计算?
还有一个 1/2m^2+5m+4

1/2m^2+m-4
=1/2(m²+2m-8)
=1/2(m+4)(m-2)