Question 61796
{{{(x+3)^3 = (x+3)(x+3)^2}}}.

{{{(x+3)^2 = (x+3)(x+3) = x^2+6x+9}}}

{{{(x+3)^3 = (x+3)(x^2+6x+9) = x(x^2+6x+9) +3(x^2+6x+9) = (x^3+6x^2+9x) + (3x^2+18x+27) = x^3 + 9x^2 +27x + 27}}}.