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50=-10t-4.9t^2
We move all terms to the left:
50-(-10t-4.9t^2)=0
We get rid of parentheses
4.9t^2+10t+50=0
a = 4.9; b = 10; c = +50;
Δ = b2-4ac
Δ = 102-4·4.9·50
Δ = -880
Delta is less than zero, so there is no solution for the equation
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