2x do 3 - x= 0
x(2x^2-1)=0
x=0 2x^2-1=0
2x^2=1 /:2
x^2=1/2
x=pierwiastek z 1/2
x=pierwiastek z2/2
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x(2x^2-1)=0
x=0 2x^2-1=0
2x^2=1 /:2
x^2=1/2
x=pierwiastek z 1/2
x=pierwiastek z2/2