SOLUTION: (3x-1)^3 Ive started with FOIL. (3x-1) (3x-1) 9x-3x-3x+1 I have a feeling this is not right,please help me go from here. I do know once I get this answer,I will need to

Algebra ->  Polynomials-and-rational-expressions -> SOLUTION: (3x-1)^3 Ive started with FOIL. (3x-1) (3x-1) 9x-3x-3x+1 I have a feeling this is not right,please help me go from here. I do know once I get this answer,I will need to      Log On


   

Question 180356: (3x-1)^3
Ive started with FOIL.
(3x-1) (3x-1)
9x-3x-3x+1
I have a feeling this is not right,please help me go from here. I do know once I get this answer,I will need to multiply it once again by (3x-1). Thanks so much!
Answer by Mathtut(3670) About Me  (Show Source):
You can put this solution on YOUR website!
(3x-1)^3
:
%283x-1%29+%283x-1%29
:
9x-3x-3x+1.....you are very close--->remember x times x is x%5E2
:
9x%5E2-6x%2B1
:
%28+9x%5E2-6x%2B1%29%283x-1%29
:
9x%5E2%283x%29%2B9x%5E2%28-1%29-%286x%29%283x%29-%28-6x%29%281%29%2B1%283x%29%2B1%28-1%29
:
27x%5E3-9x%5E2-18x%5E2%2B6x%2B3x-1
:
27x%5E3-27x%5E2%2B9x-1