Question

没安matlab，请已经安了的朋友帮我算个三次方程x^3-12.18x^2-42.5=0一次项系

没安matlab，请已经安了的朋友帮我算个三次方程x^3-12.18x^2-42.5=0一次项系数为0

Answer 1

>> x=solve('x^3-12.18*x^2-42.5=0','x')

x =

[ 12.45401248 ]
[ ]
[-0.1370062380 + 1.842222594 i]
[ ]
[-0.1370062380 - 1.842222594 i]