n^2=6n-9

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Solution for n^2=6n-9 equation: 



n^2=6n-9

We move all terms to the left:

n^2-(6n-9)=0

We get rid of parentheses

n^2-6n+9=0

a = 1; b = -6; c = +9;
Δ = b2-4ac
Δ = -62-4·1·9
Δ = 0
Delta is equal to zero, so there is only one solution to the equation

                              Stosujemy wzór:
$n=\frac{-b}{2a}=\frac{6}{2}=3$

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