- #1
cathal84
- 15
- 0
Homework Statement
Hello, pretty back to basics with this one. How this came about was I am finding the eigenvalues for a given matrix and after forming the characteristic polynomial of the matrix i get this.
x^3 - 2x^2 -15x +36
Homework Equations
Using the rational root theorem i came to the conclusion that i have factor out (x-3) out of my function above.
The Attempt at a Solution
The answer after you factor out (x-3) from x^3 - 2x^2 -15x +36
is equal to (x-3)(x^2+x-12)
I have confirmation that this is the correct answer but i do not understand how to get there.
So if someone could show me how it is done step by step that would be great. Thanks