40=25t-5t^2

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Solution for 40=25t-5t^2 equation: 



40=25t-5t^2

We move all terms to the left:

40-(25t-5t^2)=0

We get rid of parentheses

5t^2-25t+40=0

a = 5; b = -25; c = +40;
Δ = b2-4ac
Δ = -252-4·5·40
Δ = -175
Delta is less than zero, so there is no solution for the equation

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