30=8t-4.9t^2

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Solution for 30=8t-4.9t^2 equation: 



30=8t-4.9t^2

We move all terms to the left:

30-(8t-4.9t^2)=0

We get rid of parentheses

4.9t^2-8t+30=0

a = 4.9; b = -8; c = +30;
Δ = b2-4ac
Δ = -82-4·4.9·30
Δ = -524
Delta is less than zero, so there is no solution for the equation

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