f(x)=x^4+3x^3+x^2-12x-20

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Solution for f(x)=x^4+3x^3+x^2-12x-20 equation: 


Simplifying
f(x) = x4 + 3x3 + x2 + -12x + -20

Multiply f * x
fx = x4 + 3x3 + x2 + -12x + -20

Reorder the terms:
fx = -20 + -12x + x2 + 3x3 + x4

Solving
fx = -20 + -12x + x2 + 3x3 + x4

Solving for variable 'f'.

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

Divide each side by 'x'.
f = -20x-1 + -12 + x + 3x2 + x3

Simplifying
f = -20x-1 + -12 + x + 3x2 + x3

Reorder the terms:
f = -12 + -20x-1 + x + 3x2 + x3

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