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0=-y^2-4y-6
We move all terms to the left:
0-(-y^2-4y-6)=0
We add all the numbers together, and all the variables
-(-y^2-4y-6)=0
We get rid of parentheses
y^2+4y+6=0
a = 1; b = 4; c = +6;
Δ = b2-4ac
Δ = 42-4·1·6
Δ = -8
Delta is less than zero, so there is no solution for the equation
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