-9x+x^2=-9x

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Solution for -9x+x^2=-9x equation: 



-9x+x^2=-9x

We move all terms to the left:

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

We get rid of parentheses

x^2-9x+9x=0

We add all the numbers together, and all the variables

x^2=0

a = 1; b = 0; c = 0;
Δ = b2-4ac
Δ = 02-4·1·0
Δ = 0
Delta is equal to zero, so there is only one solution to the equation

                              Stosujemy wzór:
$x=\frac{-b}{2a}=\frac{0}{2}=0$

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