SOLUTION: x^3+7x^2-4x-28=0 Solve.

Algebra ->  Polynomials-and-rational-expressions -> SOLUTION: x^3+7x^2-4x-28=0 Solve.      Log On


   

Question 541032: x^3+7x^2-4x-28=0
Solve.
Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!
x^3+7x^2-4x-28=0


(x^3+7x^2)+(-4x-28)=0


x^2(x+7)+(-4x-28)=0


x^2(x+7)-4(x+7)=0


(x^2-4)(x+7)=0


(x-2)(x+2)(x+7)=0


x-2=0, x+2=0, x+7=0


x=2, x=-2, x=-7


If you need more help, email me at jim_thompson5910@hotmail.com

Also, please consider visiting my website: http://www.freewebs.com/jimthompson5910/home.html and making a donation. Thank you

Jim