Question

given: f(x)=4x^2-5
find: f(5)=

Answer 1

This question is basically asking you to plug in 5 as x:

f(x) = 4x^2 - 5
f(5) = 4(5)^2 - 5
f(5) = 4(25) - 5
f(5) = 100 - 5
f(5) = 95

Hope this helps!