F(-8)=x^2-3x

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Solution for F(-8)=x^2-3x equation: 



(-8)=F^2-3F

We move all terms to the left:

(-8)-(F^2-3F)=0

We add all the numbers together, and all the variables

-(F^2-3F)-8=0

We get rid of parentheses

-F^2+3F-8=0

We add all the numbers together, and all the variables

-1F^2+3F-8=0

a = -1; b = 3; c = -8;
Δ = b2-4ac
Δ = 32-4·(-1)·(-8)
Δ = -23
Delta is less than zero, so there is no solution for the equation

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