9x2=18x-9

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Solution for 9x2=18x-9 equation: 



9x^2=18x-9

We move all terms to the left:

9x^2-(18x-9)=0

We get rid of parentheses

9x^2-18x+9=0

a = 9; b = -18; c = +9;
Δ = b2-4ac
Δ = -182-4·9·9
Δ = 0
Delta is equal to zero, so there is only one solution to the equation

                              Stosujemy wzór:
$x=\frac{-b}{2a}=\frac{18}{18}=1$

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