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x^3-3x-x^2+3=0
x(x^2-3)-(x^2-3)=0
(x^2-3)(x-1)=0
(x^2-3)=0 lub (x-1)=0
x^2=3 lub x=1
x=pierwiastek z 3 lub x=-pierwiastek z 3
Odp x=pierwiastek z 3 lub x=-pierwiastek z 3 lub x=1