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3k^2-12=-72
We move all terms to the left:
3k^2-12-(-72)=0
We add all the numbers together, and all the variables
3k^2+60=0
a = 3; b = 0; c = +60;
Δ = b2-4ac
Δ = 02-4·3·60
Δ = -720
Delta is less than zero, so there is no solution for the equation
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