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60=12x-x^2
We move all terms to the left:
60-(12x-x^2)=0
We get rid of parentheses
x^2-12x+60=0
a = 1; b = -12; c = +60;
Δ = b2-4ac
Δ = -122-4·1·60
Δ = -96
Delta is less than zero, so there is no solution for the equation
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