Ответ:
2x^2-18=0
2x^2=18
x^2=9
x1=3
x2=-3
Ответ:-3¡3
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-3;3
Ответ:
2x^2-18=0
2x^2=18
x^2=9
x1=3
x2=-3
Ответ:-3¡3