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2a+1=-9a^2
We move all terms to the left:
2a+1-(-9a^2)=0
We get rid of parentheses
9a^2+2a+1=0
a = 9; b = 2; c = +1;
Δ = b2-4ac
Δ = 22-4·9·1
Δ = -32
Delta is less than zero, so there is no solution for the equation
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