f(x)=x^6+2x^5-x^4+x^3-9x^2+20

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Solution for f(x)=x^6+2x^5-x^4+x^3-9x^2+20 equation: 


Simplifying
f(x) = x6 + 2x5 + -1x4 + x3 + -9x2 + 20

Multiply f * x
fx = x6 + 2x5 + -1x4 + x3 + -9x2 + 20

Reorder the terms:
fx = 20 + -9x2 + x3 + -1x4 + 2x5 + x6

Solving
fx = 20 + -9x2 + x3 + -1x4 + 2x5 + x6

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 + -9x + x2 + -1x3 + 2x4 + x5

Simplifying
f = 20x-1 + -9x + x2 + -1x3 + 2x4 + x5

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