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_______________ 3 / ____ 1 \/ 27 + 3*\/ 78 x1 = - ------------------ - ------------------ _______________ 3 3 / ____ \/ 27 + 3*\/ 78
x1 = -(3*sqrt(78) + 27)^(1/3)/3 - 1/(3*sqrt(78) + 27)^(1/3)
suma
_______________ 3 / ____ 1 \/ 27 + 3*\/ 78 - ------------------ - ------------------ _______________ 3 3 / ____ \/ 27 + 3*\/ 78
=
_______________ 3 / ____ 1 \/ 27 + 3*\/ 78 - ------------------ - ------------------ _______________ 3 3 / ____ \/ 27 + 3*\/ 78
producto
_______________ 3 / ____ 1 \/ 27 + 3*\/ 78 - ------------------ - ------------------ _______________ 3 3 / ____ \/ 27 + 3*\/ 78
=
/ 2/3\ 3 ___ |3 ___ / ____\ | -\/ 3 *\\/ 3 + \9 + \/ 78 / / --------------------------------- ____________ 3 / ____ 3*\/ 9 + \/ 78
-3^(1/3)*(3^(1/3) + (9 + sqrt(78))^(2/3))/(3*(9 + sqrt(78))^(1/3))