f(-3)=x^2-4x

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Solution for f(-3)=x^2-4x equation: 


Simplifying
f(-3) = x2 + -4x

Reorder the terms for easier multiplication:
-3f = x2 + -4x

Reorder the terms:
-3f = -4x + x2

Solving
-3f = -4x + x2

Solving for variable 'f'.

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

Divide each side by '-3'.
f = 1.333333333x + -0.3333333333x2

Simplifying
f = 1.333333333x + -0.3333333333x2

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