F(-3)=x^2-x-9

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Solution for F(-3)=x^2-x-9 equation: 


Simplifying
F(-3) = x2 + -1x + -9

Reorder the terms for easier multiplication:
-3F = x2 + -1x + -9

Reorder the terms:
-3F = -9 + -1x + x2

Solving
-3F = -9 + -1x + 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 = 3 + 0.3333333333x + -0.3333333333x2

Simplifying
F = 3 + 0.3333333333x + -0.3333333333x2

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