F(-1)=x2+x

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Solution for F(-1)=x2+x equation: 



(-1)=F2+F

We move all terms to the left:

(-1)-(F2+F)=0

We add all the numbers together, and all the variables

-(+F^2+F)+(-1)=0

We add all the numbers together, and all the variables

-(+F^2+F)-1=0

We get rid of parentheses

-F^2-F-1=0

We add all the numbers together, and all the variables

-1F^2-1F-1=0

a = -1; b = -1; c = -1;
Δ = b2-4ac
Δ = -12-4·(-1)·(-1)
Δ = -3
Delta is less than zero, so there is no solution for the equation

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