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12x(x-3)=-54
We move all terms to the left:
12x(x-3)-(-54)=0
We add all the numbers together, and all the variables
12x(x-3)+54=0
We multiply parentheses
12x^2-36x+54=0
a = 12; b = -36; c = +54;
Δ = b2-4ac
Δ = -362-4·12·54
Δ = -1296
Delta is less than zero, so there is no solution for the equation
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