x=-12是方程3x+m/12-5x/8=1的解,有-36+m/12+5*12/8=1
解得m=708
-m^2-2(2m^3-m^3+3m)-4(1/2-m^3)
=-m^2-2m^3-6m-2+4m^3
=2m^3-m^2-6m-2
将m代进去自己算一下吧,值有点在呀~~
x=-12是方程3x+m/12-5x/8=1的解,有-36+m/12+5*12/8=1
解得m=708
-m^2-2(2m^3-m^3+3m)-4(1/2-m^3)
=-m^2-2m^3-6m-2+4m^3
=2m^3-m^2-6m-2
将m代进去自己算一下吧,值有点在呀~~