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0.9t-9.8t^2=450
We move all terms to the left:
0.9t-9.8t^2-(450)=0
a = -9.8; b = 0.9; c = -450;
Δ = b2-4ac
Δ = 0.92-4·(-9.8)·(-450)
Δ = -17639.19
Delta is less than zero, so there is no solution for the equation
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