f(3) = -5*3^2 - 3 + 20 = -5*9 - 3 + 20 = -45 - 3 + 20 = -28;
Answer: - 28
Step-by-step explanation:
f(x) = -5x^2 - x + 20
To find f(3), we simply put x = 3 and then simplify
f(3) = - 5(3)^2 - 3 + 20
= -5(9) - 3 + 20
= -45 - 3 + 20
= -48 +20
= -28
f(3) = -28
