Hi
I need help on the following equation:
1)
use quadratic equation:
i get
or
my question is do i simplify this to find the roots or leave it?
P.S
It's very clear that z = -1 is a solution to . Therefore z + 1 is a factor. Divide z + 1 into to get a cubic factor. It is very clear that z + 1 is also a factor of the cubic. Divide it into the cubic to get a quadratic factor. Factorise the quadratic in the usual way.
From the factor you get the solutions. There is sure to be examples like this in your class notes and textbook. Go back and review this material.