|2x+9|=4

Lösung

∣ 2 x + 9 ∣ = 4

x = - \frac{13}{2} or x = - \frac{5}{2}

Dezimale

x = - 6.5, x = - 2.5

Schritte zur Lösung

∣ 2 x + 9 ∣ = 4

Wende Absoluteregel an: Wenn

∣ u ∣ = a, a > 0

dann

u = a

u = - a

2 x + 9 = - 4 or 2 x + 9 = 4

2 x + 9 = - 4 or 2 x + 9 = 4

x = - \frac{13}{2} or x = - \frac{5}{2}

9 ∣ u + 30 ∣ = 90

so l v e f or x, - f = ∣ x ∣

∣ 3 v + 5 ∣ = 8

∣ 2 x + 5 ∣ + 9 = 6

∣ 2 x - 1 ∣ - 4 = 3 x + 7