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60=5t-4.9t^2
We move all terms to the left:
60-(5t-4.9t^2)=0
We get rid of parentheses
4.9t^2-5t+60=0
a = 4.9; b = -5; c = +60;
Δ = b2-4ac
Δ = -52-4·4.9·60
Δ = -1151
Delta is less than zero, so there is no solution for the equation
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