f(-9)=x^2-5x-12

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Solution for f(-9)=x^2-5x-12 equation: 


Simplifying
f(-9) = x2 + -5x + -12

Reorder the terms for easier multiplication:
-9f = x2 + -5x + -12

Reorder the terms:
-9f = -12 + -5x + x2

Solving
-9f = -12 + -5x + x2

Solving for variable 'f'.

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

Divide each side by '-9'.
f = 1.333333333 + 0.5555555556x + -0.1111111111x2

Simplifying
f = 1.333333333 + 0.5555555556x + -0.1111111111x2

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