# How do you simplify -2x (x - y - 4) + y (6x - 2y + 3)?

$- 2 {x}^{2} - 2 {y}^{2} + 8 x y + 8 x + 3 y$
$= - 2 {x}^{2} + 2 x y + 8 x + 6 x y - 2 {y}^{2} + 3 y =$
Now collect similar terms (for example terms with $x y$):
$= - 2 {x}^{2} - 2 {y}^{2} + 8 x y + 8 x + 3 y$