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X2-14X+49=0
We add all the numbers together, and all the variables
X^2-14X+49=0
a = 1; b = -14; c = +49;
Δ = b2-4ac
Δ = -142-4·1·49
Δ = 0
Delta is equal to zero, so there is only one solution to the equation
Stosujemy wzór:$X=\frac{-b}{2a}=\frac{14}{2}=7$
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