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Beliebt Algebra >

x^4+3x^2+1=0

Lösung

x^{4} + 3 x^{2} + 1 = 0

Lösung

x = \frac{- 3 + 5}{2}, x = - \frac{- 3 + 5}{2}, x = \frac{- 3 - 5}{2}, x = - \frac{- 3 - 5}{2}

Schritte zur Lösung

x^{4} + 3 x^{2} + 1 = 0

Schreibe die Gleichung um mit

u = x^{2}

und

u^{2} = x^{4}

u^{2} + 3 u + 1 = 0

Löse

u^{2} + 3 u + 1 = 0 : u = \frac{- 3 + 5}{2}, u = \frac{- 3 - 5}{2}

u = \frac{- 3 + 5}{2}, u = \frac{- 3 - 5}{2}

Setze

u = x^{2} w i e d er e in,

löse für

x

Löse

x^{2} = \frac{- 3 + 5}{2} : x = \frac{- 3 + 5}{2}, x = - \frac{- 3 + 5}{2}

Löse

x^{2} = \frac{- 3 - 5}{2} : x = \frac{- 3 - 5}{2}, x = - \frac{- 3 - 5}{2}

Die Lösungen sind

x = \frac{- 3 + 5}{2}, x = - \frac{- 3 + 5}{2}, x = \frac{- 3 - 5}{2}, x = - \frac{- 3 - 5}{2}

Graph

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