-81x^2+90x-25=0

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Solution for -81x^2+90x-25=0 equation: 



-81x^2+90x-25=0

a = -81; b = 90; c = -25;
Δ = b2-4ac
Δ = 902-4·(-81)·(-25)
Δ = 0
Delta is equal to zero, so there is only one solution to the equation

                              Stosujemy wzór:
$x=\frac{-b}{2a}=\frac{-90}{-162}=5/9$

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