f(x)=-16x^2 What is the inverse function of.. I need the answer plzzzzzz, assume that all variables are positive. Again, does anyone know the answer? Someone out there is smart, i know there is.......

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x = -(16y^2)
x/16 = -(y^2)
sqrt(x)/4 = -y
- sqrt(x)/4 = y

maybe

but that would come out to having an i in the final answer correct?

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