(3-x)(3-x)=0

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Solution for (3-x)(3-x)=0 equation: 



(3-x)(3-x)=0

We add all the numbers together, and all the variables

(-1x+3)(-1x+3)=0

We multiply parentheses ..

(+x^2-3x-3x+9)=0

We get rid of parentheses

x^2-3x-3x+9=0

We add all the numbers together, and all the variables

x^2-6x+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:
$x=\frac{-b}{2a}=\frac{6}{2}=3$

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