Question

Evaluate the function

f(x)=−4x^2+6x−4

Find f(5)

Answer 1

Hey there!

1. How to find f(5)?

• To find f(5) - simply substitute x = 5 in the function. f(5) means the value of f(x) at x = 5.

2. Substitution and Evaluate

$\large{f(5) = - 4( {5})^{2} + 6(5) - 4}$

Remember to follow the PEMDAS/BODMAS rules! Exponent comes before multiplication.

$\large{f(5) = - 4(25) + 30 - 4} \\ \large{f(5) = - 100 + 30 - 4} \\ \large{f(5) = - 74}$

3. Final Answer

• f(5) = -74

If you have any questions regarding the question or my answer, feel free to ask!