SOLUTION: x^3+ 5x^2 -6x -30=0 How do you solve this? please help me!!!! This is confusing!

Algebra ->  Quadratic Equations and Parabolas  -> Quadratic Equations Lessons  -> Quadratic Equation Lesson -> SOLUTION: x^3+ 5x^2 -6x -30=0 How do you solve this? please help me!!!! This is confusing!       Log On


   



Question 539051: x^3+ 5x^2 -6x -30=0
How do you solve this? please help me!!!!
This is confusing!

Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
x^3+ 5x^2 -6x -30=0
---
I graphed it and found a root at x = -5
---
Use synthetic division to find the quadratic factor:
-5)....1....5....-6....-30
........1....0.....-6...|..0
Quotient: x^2 - 6
---
Roots at x = +-sqrt(6) and x = -5
=====================================
Cheers,
Stan H.
==============