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2 Gleichungen

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2.2 Algebraische Gleichungen

0/1/2/3

2.2.4 Bi-quadratische Gleichungen

0/1/2/3/1 .
Beispiel 2 - 10

x4 - 10x2 + 9 = 0
Substituiere: z = x2
z2 - 10z + 9 = 0

x4 - 10x2 + 9 = 0
Substituiere: z = x2
z2 - 10z + 9 = 0 z 1,25 ± 4
Rücksubstitution: x2 = z
x2 = z 1 = 9 x1,2 = ±3
x2 = z 2 = 1 x3,4 = ±1
L = {-3,-1, 1, 3} .
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