f(4)=8x-x^2

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Solution for f(4)=8x-x^2 equation: 


Simplifying
f(4) = 8x + -1x2

Reorder the terms for easier multiplication:
4f = 8x + -1x2

Solving
4f = 8x + -1x2

Solving for variable 'f'.

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

Divide each side by '4'.
f = 2x + -0.25x2

Simplifying
f = 2x + -0.25x2

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