b2+2b=-20

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Solution for b2+2b=-20 equation: 



b2+2b=-20

We move all terms to the left:

b2+2b-(-20)=0

We add all the numbers together, and all the variables

b^2+2b+20=0

a = 1; b = 2; c = +20;
Δ = b2-4ac
Δ = 22-4·1·20
Δ = -76
Delta is less than zero, so there is no solution for the equation

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