f(3)=x^4+3x^3-6x^2-12x-8

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Solution for f(3)=x^4+3x^3-6x^2-12x-8 equation: 


Simplifying
f(3) = x4 + 3x3 + -6x2 + -12x + -8

Reorder the terms for easier multiplication:
3f = x4 + 3x3 + -6x2 + -12x + -8

Reorder the terms:
3f = -8 + -12x + -6x2 + 3x3 + x4

Solving
3f = -8 + -12x + -6x2 + 3x3 + x4

Solving for variable 'f'.

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

Divide each side by '3'.
f = -2.666666667 + -4x + -2x2 + x3 + 0.3333333333x4

Simplifying
f = -2.666666667 + -4x + -2x2 + x3 + 0.3333333333x4

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