nilai x yang memenuhi persamaan |4x|-2=10

Bab NIlai Mutlak
Matematika SMA Kelas X

|4x| - 2 = 10
|4x| = 10 + 2
|4x| = 12

4x = 12
x = 12/4
x = 3

4x = -12
x = -12/4
x = -3

HP = { -3, 3 }

Materi : Persamaan Mutlak

Pembahasan :
|4x| - 2 = 10
|4x| = 10 + 2
|4x| = 12
|4| |x| = 12
4|x| = 12
|x| = 3
x² = 3²
x² - 3² = 0
(x + 3)(x - 3) = 0
x = -3
x = 3

Hp : {-3 , 3}