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4s^2-16s+16=0
a = 4; b = -16; c = +16;
Δ = b2-4ac
Δ = -162-4·4·16
Δ = 0
Delta is equal to zero, so there is only one solution to the equation
Stosujemy wzór:$s=\frac{-b}{2a}=\frac{16}{8}=2$
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