f(x)=9x^2-16

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Solution for f(x)=9x^2-16 equation: 


Simplifying
f(x) = 9x2 + -16

Multiply f * x
fx = 9x2 + -16

Reorder the terms:
fx = -16 + 9x2

Solving
fx = -16 + 9x2

Solving for variable 'f'.

Move all terms containing f to the left, all other terms to the right.

Divide each side by 'x'.
f = -16x-1 + 9x

Simplifying
f = -16x-1 + 9x

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