Hey everyone, so I have to find the roots of the equation (in decimal form) of this equation: \(\frac{1}{2}{x}^{3}+{x}^{2}-32x-20\), but I'm unsure how to do it. Normally I would just factor this to get a quadratic, but I can't do that with this equation. All the methods I've found online seem beyond my skills, I'm only in grade 11. I have a hint which says: "It will not be possible to find roots by inspection and you need to be resourceful here!".

Thank you for your help!

Guest Feb 13, 2021