f(x)=x^4+x^3-23x^2-3x+90

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Solution for f(x)=x^4+x^3-23x^2-3x+90 equation: 


Simplifying
f(x) = x4 + x3 + -23x2 + -3x + 90

Multiply f * x
fx = x4 + x3 + -23x2 + -3x + 90

Reorder the terms:
fx = 90 + -3x + -23x2 + x3 + x4

Solving
fx = 90 + -3x + -23x2 + x3 + 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 = 90x-1 + -3 + -23x + x2 + x3

Simplifying
f = 90x-1 + -3 + -23x + x2 + x3

Reorder the terms:
f = -3 + 90x-1 + -23x + x2 + x3

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