Question

Evaluate f(x)= 5x^2-9x at the given value of x.

​f(4​)
f(4)= (simplify your answer)

Answer 1

f(4) = 44

Explanation:

To evaluate f(4) substitute x = 4 into f(x)

f(4) = 5(4)² - (9 × 4) = (5 × 16) - 36 = 80 - 36 = 44