$$\left. \begin{array} { l } { f ( x - 3 x - 2 x - 2 x ) } \\ { f ( x - 3 x - 2 x - 2 ) } \end{array} \right.$$
$6fx\left(2x+1\right)$
$$-4fx-2f=2f\left(-2x-1\right)$$
$$6fx\left(2x+1\right)$$
$$12fx^{2}+6fx$$
Show Solution
Hide Solution
$-6fx,\ -4fx-2f$
