Question

If f(x) = 7x2 - 8, what is f(2)?

Answer 1

the question it self

Answer 2

f(2) does equal f(x) = 7x2 - 8

Answer 3

lol what is 28-8

Answer 4

If you are given f(x) and you want to find f(c) where c is some number/constant, then all you have to do is to put c in place of x in the original expression of f(x) and simplify it.

For example, \[\large{f(x) = 7x^2 - 8}\]
If I want to find f(1)

Then, put 1 in place of x in original expression of f(x):

\[\large{f(1) = 7*(1)^2 - 8}\]

Simplify it:

\[\large{f(1) = 7 - 8 = -1}\]

This is would be the value

Similarly you can find out f(2)