Answer
$f(x)=-3(x+2)^{2}+4$
Work Step by Step
The given function: $g(x) = -3x^{2}$
With a maximum value of 4 at x=2.
You have to add both 4 and 2 to the equation to get
$f(x)=-3(x+2)^{2}+4$
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