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-294=4.9t^2+34.3t
We move all terms to the left:
-294-(4.9t^2+34.3t)=0
We get rid of parentheses
-4.9t^2-34.3t-294=0
a = -4.9; b = -34.3; c = -294;
Δ = b2-4ac
Δ = -34.32-4·(-4.9)·(-294)
Δ = -4585.91
Delta is less than zero, so there is no solution for the equation
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