# How do you simplify  (14x^2 + 13x + 12) - (7x^2 + 20x + 4)?

$\left(14 {x}^{2} + 13 x + 12\right) - \left(7 {x}^{2} + 20 x + 4\right)$
$14 {x}^{2} + 13 x + 12 - 7 {x}^{2} - 20 x - 4$
$= \left(14 {x}^{2} - 7 {x}^{2}\right) + \left(13 x - 20 x\right) + \left(12 - 4\right)$
$= \left(14 - 7\right) {x}^{2} + \left(13 - 20\right) x + \left(12 - 4\right)$
$= 7 {x}^{2} - 7 x + 8$