3- |4x – 5| = -5 nilai mutlak

Matematika Wajib
Persamaan Mutlak X SMA

Pembahasan :
3 – |4x – 5| = -5
|4x – 5| = 3 + 5
|4x – 5| = 8
(4x – 5)² = 8²
(4x – 5)² – 8² = 0
(4x – 5 + 8)(4x – 5 – 8) = 0
(4x + 3)(4x – 13) = 0
x = -3/4
x = 13/4

Hp : {-3/4 , 13/4}