Question

I need help these roots are killing me.
Find all of the roots of the equation: 3x^3+3x^2=27x ? Please explain how to do it.

Answer 1

subtract 27x from both sides,

and factor out the 3x !

tell me what u get?

Answer 2

-27x+3x^3+3x^2=0
3x(-9+x+x^2)

Answer 3

yes, x= 0
now solve
-9+x+x^2 = 0
using a quadratic formula

Answer 4

I got x=2.541 and x= -3.541

Answer 5

those are correct! :)

Answer 6

x=0, x=2.541 and x= -3.541

Answer 7

Those are the roots? Yay!!!! Thanks sooooo much for your help again!!! :D <3

Answer 8

yes, and welcome ^_^