Nilai x dari persamaan |4x + 2| = |4| adalah

Kelas 10 Matematika
Bab Nilai Mutlak

|4x + 2| = |4|
(4x + 2)² - 4² = 0
(4x + 2 + 4) (4x + 2 - 4) = 0
(4x + 6) (4x - 2) = 0
4x + 6 = 0
4x = -6
x = -6/4
x = -3/2

4x - 2 = 0
4x = 2
x = 2/4
x = 1/2

Maka,
x = -3/2
x = 1/2