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2t^2+t+12=6
We move all terms to the left:
2t^2+t+12-(6)=0
We add all the numbers together, and all the variables
2t^2+t+6=0
a = 2; b = 1; c = +6;
Δ = b2-4ac
Δ = 12-4·2·6
Δ = -47
Delta is less than zero, so there is no solution for the equation
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