f(-5)=4x-x^2

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Solution for f(-5)=4x-x^2 equation: 


Simplifying
f(-5) = 4x + -1x2

Reorder the terms for easier multiplication:
-5f = 4x + -1x2

Solving
-5f = 4x + -1x2

Solving for variable 'f'.

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

Divide each side by '-5'.
f = -0.8x + 0.2x2

Simplifying
f = -0.8x + 0.2x2

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