40=5t-4.9t^2

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Solution for 40=5t-4.9t^2 equation: 



40=5t-4.9t^2

We move all terms to the left:

40-(5t-4.9t^2)=0

We get rid of parentheses

4.9t^2-5t+40=0

a = 4.9; b = -5; c = +40;
Δ = b2-4ac
Δ = -52-4·4.9·40
Δ = -759
Delta is less than zero, so there is no solution for the equation

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