Final answer:
To calculate f(-2) for the function f(x)=-3x²-4x², we substitute -2 for x, simplify the equation, and find that f(-2) equals -28.
Step-by-step explanation:
The question asks to compute the value of f(x) when x is -2 for the given function f(x)=-3x²-4x². To find f(-2), we substitute x with -2 and simplify:
f(-2) = -3(-2)² - 4(-2)²
= -3(4) - 4(4)
= -12 - 16
= -28
Therefore, f(-2) equals -28.