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n^2+2n+1=-20
We move all terms to the left:
n^2+2n+1-(-20)=0
We add all the numbers together, and all the variables
n^2+2n+21=0
a = 1; b = 2; c = +21;
Δ = b2-4ac
Δ = 22-4·1·21
Δ = -80
Delta is less than zero, so there is no solution for the equation
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