f(4x)=x^2-9

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Solution for f(4x)=x^2-9 equation: 


Simplifying
f(4x) = x2 + -9

Remove parenthesis around (4x)
f * 4x = x2 + -9

Reorder the terms for easier multiplication:
4f * x = x2 + -9

Multiply f * x
4fx = x2 + -9

Reorder the terms:
4fx = -9 + x2

Solving
4fx = -9 + x2

Solving for variable 'f'.

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

Divide each side by '4x'.
f = -2.25x-1 + 0.25x

Simplifying
f = -2.25x-1 + 0.25x

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