|x|<13

Lösung

∣ x ∣ < 13

- 13 < x < 13

Intervall-Notation

(- 13, 13)

Schritte zur Lösung

∣ x ∣ < 13

Wende Absoluteregel an: Wenn

∣ u ∣ < a, a > 0

dann

- a < u < a

- 13 < x < 13

\frac{4}{( x ^{2} + 9 )} > 0

8 x - 12 = 15 x - 4 x

\frac{3 x + 14}{4} - 16 = - 15

∣ x - 9 ∣ = 2

4 x^{2} + 6 x - 4 = 0