Question 210366
{{{-5x(3x^2-4x-9)}}}
{{{-15x^3 + 20x^2 + 45x}}}


{{{(5-3x)(4+7x)}}}
{{{20 + 35x - 12x - 21x^2}}}
{{{ -21x^2 + 23x + 20}}}


{{{(3x+5)^2}}}
{{{(3x+5)(3x+5)}}}
{{{9x^2 + 15x + 15x + 25}}}
{{{9x^2 + 30x + 25}}}