find $f(-2)$ for the function $f(x)=3x^{2}-2x + 7$.\n-13\n-1\n1\n23

Answer:

D. 23

Explanation:

Step1: Substitute x = -2

$f(-2)=3(-2)^2-2(-2)+7$

Step2: Calculate powers

$(-2)^2 = 4$, so $f(-2)=3\times4 - 2(-2)+7$

Step3: Perform multiplications

$3\times4=12$ and $-2(-2) = 4$, then $f(-2)=12 + 4+7$

Step4: Perform additions

$12+4+7=23$