Ok so i cant figure this out to save my life, if someone could plz help me try to understand this that would b amazing hrre is the equation

Calculate f(-4) for the function f(x=×2nd +4×_2

f(x) = x^2 + 4 x^-2

= x^2 + 4/x^2 [note x^-2 is simply 1/ positive power)

f(-4) = (-4)^2 + 4/ (-4)^2

=16 + 4/16

=16 + 1/4

=16 1/4 or 16.25

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