f(-5)=x^2+9x-8

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Solution for f(-5)=x^2+9x-8 equation: 


Simplifying
f(-5) = x2 + 9x + -8

Reorder the terms for easier multiplication:
-5f = x2 + 9x + -8

Reorder the terms:
-5f = -8 + 9x + x2

Solving
-5f = -8 + 9x + x2

Solving for variable 'f'.

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

Divide each side by '-5'.
f = 1.6 + -1.8x + -0.2x2

Simplifying
f = 1.6 + -1.8x + -0.2x2

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