|2x+9|=5

Lösung

∣ 2 x + 9 ∣ = 5

x = - 7 or x = - 2

Schritte zur Lösung

∣ 2 x + 9 ∣ = 5

Wende Absoluteregel an: Wenn

∣ u ∣ = a, a > 0

dann

u = a

u = - a

2 x + 9 = - 5 or 2 x + 9 = 5

2 x + 9 = - 5 or 2 x + 9 = 5

x = - 7 or x = - 2