Question

Dada a função f(x)=2x²-6x-4 , calcule f (-4) :

Answer 1

$f(x)=2x^{2}-6x-4\\\\f(-4)=2(-4)^{2}-6(-4)-4\\\\f(-4)=2(16)+24-4\\\\f(-4)=32+20\\\\\boxed{\boxed{f(-4)=52}}$