Given the function f(x) = −5x2 − x + 20, find f(3).
f(x) = -5x^2 - x + 20;
f(3) = -53^2 - 3 + 20 = -59 - 3 + 20 = -45 - 3 + 20 = -28;
Answer: -28
given the function f(x) =-5x2 - x +20
find f(3)
