f(x)=(x^2-9)

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


Simplifying
f(x) = (x2 + -9)

Multiply f * x
fx = (x2 + -9)

Reorder the terms:
fx = (-9 + x2)

Remove parenthesis around (-9 + x2)
fx = -9 + x2

Solving
fx = -9 + x2

Solving for variable 'f'.

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

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

Simplifying
f = -9x-1 + x

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