F(X)=x^2-81

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Solution for F(X)=x^2-81 equation: 


Simplifying
F(X) = x2 + -81

Multiply F * X
FX = x2 + -81

Reorder the terms:
FX = -81 + x2

Solving
FX = -81 + 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 = -81X-1 + x2X-1

Simplifying
F = -81X-1 + x2X-1

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