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25m^2-60m+36=0
a = 25; b = -60; c = +36;
Δ = b2-4ac
Δ = -602-4·25·36
Δ = 0
Delta is equal to zero, so there is only one solution to the equation
Stosujemy wzór:$m=\frac{-b}{2a}=\frac{60}{50}=1+1/5$
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