Rozwiąż równania :
A) x(x - 2)= 0
b) X^2 - 3x = 0
c) 2x (x+5)=0
d) 3x^2 - 6x=0
e) x^2 -6x +9=0
f) x^2+4x+4=0
g) 4x^2 +4x+1=0
h) 25x^2 - 30x+0=0
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