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80=-16t^2
We move all terms to the left:
80-(-16t^2)=0
We get rid of parentheses
16t^2+80=0
a = 16; b = 0; c = +80;
Δ = b2-4ac
Δ = 02-4·16·80
Δ = -5120
Delta is less than zero, so there is no solution for the equation
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