F(x)=-x^2-9x-20/x+4

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Solution for F(x)=-x^2-9x-20/x+4 equation: 



(F)=-F^2-9F-20/F+4

We move all terms to the left:

(F)-(-F^2-9F-20/F+4)=0



Domain of the equation: F+4)!=0

F∈R



We get rid of parentheses

F^2+9F+20/F+F-4=0

We multiply all the terms by the denominator


F^2*F+9F*F+F*F-4*F+20=0

We add all the numbers together, and all the variables

F^2*F-4F+9F*F+F*F+20=0

Wy multiply elements

F^3+9F^2+F^2-4F+20=0

We do not support eFpression: F^3

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