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

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


Simplifying
f(-1x) = x2 + 9x + 5

Remove parenthesis around (-1x)
f * -1x = x2 + 9x + 5

Reorder the terms for easier multiplication:
-1f * x = x2 + 9x + 5

Multiply f * x
-1fx = x2 + 9x + 5

Reorder the terms:
-1fx = 5 + 9x + x2

Solving
-1fx = 5 + 9x + x2

Solving for variable 'f'.

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

Divide each side by '-1x'.
f = -5x-1 + -9 + -1x

Simplifying
f = -5x-1 + -9 + -1x

Reorder the terms:
f = -9 + -5x-1 + -1x

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