75=-16t^2+40t+50

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Solution for 75=-16t^2+40t+50 equation: 



75=-16t^2+40t+50

We move all terms to the left:

75-(-16t^2+40t+50)=0

We get rid of parentheses

16t^2-40t-50+75=0

We add all the numbers together, and all the variables

16t^2-40t+25=0

a = 16; b = -40; c = +25;
Δ = b2-4ac
Δ = -402-4·16·25
Δ = 0
Delta is equal to zero, so there is only one solution to the equation

                              Stosujemy wzór:
$t=\frac{-b}{2a}=\frac{40}{32}=1+1/4$

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