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Vieta置换[Vieta's Substitution] [2005-8-15]
iamet 发表在 ∑〖数学〗
| The substitution of
 (1)
into the standard form cubic equation
 (2)
The result reduces the cubic to the equation
 (3)
which is easily turned into a quadratic equation in  by multiplying through by  to obtain
 (4) |
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