# What is the standard form of  y= (x+2)(4x+10)-x^2-5x?

$3 {x}^{2} + 13 x + 20$
expanding $\left(x + 2\right) \left(4 x + 10\right) = 4 {x}^{2} + 18 x + 20$
and adding $- {x}^{2} - 5 x$
$3 {x}^{2} + 13 x + 20$