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100=6t-5t^2
We move all terms to the left:
100-(6t-5t^2)=0
We get rid of parentheses
5t^2-6t+100=0
a = 5; b = -6; c = +100;
Δ = b2-4ac
Δ = -62-4·5·100
Δ = -1964
Delta is less than zero, so there is no solution for the equation
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