Ответ:
27х^2+1-27x^3-x^2=0
1-x^2=0
-x^2=-1
x^2=1
x=+- (плюс минус)
х↓1=-1
х↓2=1
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Ответ:
27х^2+1-27x^3-x^2=0
1-x^2=0
-x^2=-1
x^2=1
x=+- (плюс минус)
х↓1=-1
х↓2=1