given the function f(x) = -2x^2 + 4x - 7, find f(-4).\n-55\n-7\n9\n25

Answer:

A. -55

Explanation:

Step1: Substitute x = -4

$f(-4)=-2(-4)^2 + 4(-4)-7$

Step2: Calculate $(-4)^2$

$(-4)^2 = 16$, so $f(-4)=-2\times16+4(-4)-7$

Step3: Perform multiplications

$-2\times16=-32$ and $4(-4)= -16$, then $f(-4)=-32-16 - 7$

Step4: Perform subtractions

$-32-16=-48$, and $-48-7=-55$