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75x^2-120x+48=0
a = 75; b = -120; c = +48;
Δ = b2-4ac
Δ = -1202-4·75·48
Δ = 0
Delta is equal to zero, so there is only one solution to the equation
Stosujemy wzór:$x=\frac{-b}{2a}=\frac{120}{150}=4/5$
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