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Автор - dimangoludenko

решите уравнение (х^2-2)(х+3)+(х^2+2)(х-3)=42

Ответ

Автор - sava991101
( x^{2} -2)(x+3)+( x^{2} +2)(x-3)=42
(x^{3} -2x+3 x^{2} -6)+( x^{3} +2x-3x^2-6)=42
2x^{3}-12 =42
2x^{3} =54
 x^{3} =27
x=3


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