Himpunan penyelesaian |9-4x|=5

Materi : Persamaan Mutlak

Pembahasan :
|9 - 4x| = 5
(9 - 4x)² = 5²
(9 - 4x)² - 5² = 0
(9 - 4x + 5)(9 - 4x - 5) = 0
(14 - 4x)(4 - 4x) = 0
x = 7/2
x = 1

Hp : {1 , 7/2}