+0

# Factoring a Cubic Equation

0
48
3

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!".

Feb 13, 2021

#1
0

Have you tried a graphing of the equation ?

Feb 13, 2021
#2
0

Thank you guest, but this is actually a small part of a larger question, so I can't use graphing to solve this.

Guest Feb 13, 2021
#3
+31707
+1

Unless you are familiar with the standard formula for the solution of a cubic equation, you will need to use a numerical method here, such as the following:

Feb 14, 2021