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I need help with a function in Algebra which is posted below

How do you slove this problem.. f(4)f(x)= 4-2x^2

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Daniel O. | Math and Physics Tutor, with a math and physics degreeMath and Physics Tutor, with a math and ...
5.0 5.0 (265 lesson ratings) (265)
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I think you have the function f(x)= 4 - 2x2 and you want to evaluate it for when x = 4. If so, you're finding f(4), so you'd plug in 4 as x, like so:

f(4) = 4 - 2*22 = ?

Wendy S. | A certified teacher with over 20 years' teaching experienceA certified teacher with over 20 years' ...
4.9 4.9 (37 lesson ratings) (37)
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Is this all of the information?  What is the function f(x) for this relationship?  Or, are there more directions for it?

 

Wendy