|-7a|=28

Lösung

∣ - 7 a ∣ = 28

a = - 4 or a = 4

Schritte zur Lösung

∣ - 7 a ∣ = 28

Wende Absoluteregel an: Wenn

∣ u ∣ = a, a > 0

dann

u = a

u = - a

- 7 a = - 28 or - 7 a = 28

- 7 a = - 28 or - 7 a = 28

a = - 4 or a = 4

- 25 x + 175 > 225

8000 = - 0.1 x^{2} + 90 x

9 < 5 x - 1 < 29

s im pl i f y \frac{\frac{3}{4}}{\frac{1}{2}}

f a c t or 25 - 9 x^{2}