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7-3 Quadratische und kubische Gleichungen
Dieser Rechner kann auch quadratische und kubische Gleichungen lösen, die den
folgenden Formaten entsprechen (wenn a
GG
GG
G 0):
•Quadratisch: ax
2
+ bx + c = 0
Kubisch: ax
3
+ bx
2
+ cx + d = 0
kk
kk
k Spezifizieren des Grads einer Gleichung
Während der Gleichungsmodus aufgerufen ist, die 2 (POLY) Taste drücken, und
danach den Grad der Gleichung spezifizieren.
• {2}/{3} ... {Quadratische}/{Kubische} Gleichung
kk
kk
k Lösen einer quadratischen oder kubischen Gleichung
Beispiel Zu lösen ist die folgende kubische Gleichung:
x
3
– 2x
2
x + 2 = 0
1. Die 2 (3) Taste drücken, um den kubischen Gleichungsmodus aufzurufen.
2. Die einzelnen Koeffizienten eingeben.
bw-cw-bwcw
•Mit jedem Drücken der wTaste wird der eingegebene Wert in der erhellten
Zelle registriert. Jedes Drücken der w Taste gibt die Werte in der folgenden
Reihenfolge ein:
Koeffizient a Koeffizient b Koeffizient c Koeffizient d
Die Eingabe des Koeffizienten d ist nur für kubische Gleichungen erforderlich.
•Sie können auch Bruchausdrücke oder Inhalte der Wertspeicher als
Koeffizienten eingeben.
3. Nach der Eingabe der Koeffizienten, die 1 (SOLV) Taste drücken, um die
Gleichungen zu lösen.
Erhellter Lösungszellenwert
132


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