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-8n(3n+4)=31
We move all terms to the left:
-8n(3n+4)-(31)=0
We multiply parentheses
-24n^2-32n-31=0
a = -24; b = -32; c = -31;
Δ = b2-4ac
Δ = -322-4·(-24)·(-31)
Δ = -1952
Delta is less than zero, so there is no solution for the equation
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