Question

question given $f(x) = -3x^2 - x - 15$, find $f(-8)$

Explanation:

Step1: Substitute $x=-8$ into $f(x)$

$f(-8) = -3(-8)^2 - (-8) - 15$

Step2: Calculate the squared term

$(-8)^2 = 64$, so $f(-8) = -3\times64 + 8 - 15$

Step3: Compute multiplication first

$-3\times64 = -192$, so $f(-8) = -192 + 8 - 15$

Step4: Perform addition and subtraction

$f(-8) = -192 + 8 - 15 = -199$

Answer:

$-199$