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-39x^2-83x=56
We move all terms to the left:
-39x^2-83x-(56)=0
a = -39; b = -83; c = -56;
Δ = b2-4ac
Δ = -832-4·(-39)·(-56)
Δ = -1847
Delta is less than zero, so there is no solution for the equation
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