Question 180356
(3x-1)^3
:
{{{(3x-1) (3x-1)}}}
: 
9x-3x-3x+1.....you are very close--->remember x times x is {{{x^2}}}
:
{{{9x^2-6x+1}}}
:
{{{( 9x^2-6x+1)(3x-1)}}}
:
{{{9x^2(3x)+9x^2(-1)-(6x)(3x)-(-6x)(1)+1(3x)+1(-1)}}}
:
{{{27x^3-9x^2-18x^2+6x+3x-1}}}
:
{{{27x^3-27x^2+9x-1}}}