Question 45989
{{{5x^3 + 54x^2 - 72x}}}
{{{x(5x^2 + 54x - 72)}}} take out the common factor
{{{x(5x^2 + 54x - 72)}}} two factors of (5*-72) that sum to (54): 60 and -6
{{{x(5x^2 + 60x - 6x - 72)}}}
{{{x((5x^2 + 60x) + (-6x - 72))}}}
{{{x(5x(x + 12) - 6(x + 12))}}}
{{{x(x + 12)(5x - 6)}}}