# What is the standard form of y=x^2(x+4)(x-5) ?

$y = {x}^{4} - {x}^{3} - 20 {x}^{2}$
$y = {x}^{2} \left(x + 4\right) \left(x - 5\right)$
$\implies y = {x}^{2} \left({x}^{2} - x - 20\right)$
$\implies y = {x}^{4} - {x}^{3} - 20 {x}^{2}$