Question

Simplify the expression: 10+-2f^2+-6+7+-2f^2+-9f

Answer 1

$10+-2f^2+-6+7+-2f^2+-9f = 10-2f^2 -6+7-2f^2 -9f \\\\= -2f^2 -2f^2 -9f+10-6+7= \boxed {-4f^2 -9f +11}$