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(F+6)=F^2+4F+9
We move all terms to the left:
(F+6)-(F^2+4F+9)=0
We get rid of parentheses
-F^2+F-4F+6-9=0
We add all the numbers together, and all the variables
-1F^2-3F-3=0
a = -1; b = -3; c = -3;
Δ = b2-4ac
Δ = -32-4·(-1)·(-3)
Δ = -3
Delta is less than zero, so there is no solution for the equation
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