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x^2=12x-864
We move all terms to the left:
x^2-(12x-864)=0
We get rid of parentheses
x^2-12x+864=0
a = 1; b = -12; c = +864;
Δ = b2-4ac
Δ = -122-4·1·864
Δ = -3312
Delta is less than zero, so there is no solution for the equation
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