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2x(2x+1)=-6
We move all terms to the left:
2x(2x+1)-(-6)=0
We add all the numbers together, and all the variables
2x(2x+1)+6=0
We multiply parentheses
4x^2+2x+6=0
a = 4; b = 2; c = +6;
Δ = b2-4ac
Δ = 22-4·4·6
Δ = -92
Delta is less than zero, so there is no solution for the equation
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