f(-x)=1-x^2+3(-x)+8

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Solution for f(-x)=1-x^2+3(-x)+8 equation:


Simplifying
f(-1x) = 1 + -1x2 + 3(-1x) + 8

Remove parenthesis around (-1x)
f * -1x = 1 + -1x2 + 3(-1x) + 8

Reorder the terms for easier multiplication:
-1f * x = 1 + -1x2 + 3(-1x) + 8

Multiply f * x
-1fx = 1 + -1x2 + 3(-1x) + 8

Remove parenthesis around (-1x)
-1fx = 1 + -1x2 + 3 * -1x + 8

Multiply 3 * -1
-1fx = 1 + -1x2 + -3x + 8

Reorder the terms:
-1fx = 1 + 8 + -3x + -1x2

Combine like terms: 1 + 8 = 9
-1fx = 9 + -3x + -1x2

Solving
-1fx = 9 + -3x + -1x2

Solving for variable 'f'.

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

Divide each side by '-1x'.
f = -9x-1 + 3 + x

Simplifying
f = -9x-1 + 3 + x

Reorder the terms:
f = 3 + -9x-1 + x

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