F(-3)=x^2-3x+9

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Solution for F(-3)=x^2-3x+9 equation: 



(-3)=F^2-3F+9

We move all terms to the left:

(-3)-(F^2-3F+9)=0

We add all the numbers together, and all the variables

-(F^2-3F+9)-3=0

We get rid of parentheses

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

We add all the numbers together, and all the variables

-1F^2+3F-12=0

a = -1; b = 3; c = -12;
Δ = b2-4ac
Δ = 32-4·(-1)·(-12)
Δ = -39
Delta is less than zero, so there is no solution for the equation

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