25n2-40n+16=0

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Solution for 25n2-40n+16=0 equation: 



25n^2-40n+16=0

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

                              Stosujemy wzór:
$n=\frac{-b}{2a}=\frac{40}{50}=4/5$

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