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10=5.5t-4.9t^2
We move all terms to the left:
10-(5.5t-4.9t^2)=0
We get rid of parentheses
4.9t^2-5.5t+10=0
a = 4.9; b = -5.5; c = +10;
Δ = b2-4ac
Δ = -5.52-4·4.9·10
Δ = -165.75
Delta is less than zero, so there is no solution for the equation
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