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-3x(2x-9)=39
We move all terms to the left:
-3x(2x-9)-(39)=0
We multiply parentheses
-6x^2+27x-39=0
a = -6; b = 27; c = -39;
Δ = b2-4ac
Δ = 272-4·(-6)·(-39)
Δ = -207
Delta is less than zero, so there is no solution for the equation
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