Harga mutlak dari [3x+8]=[4-2x]

Bab Nilai Mutlak
Matematika SMA Kelas X

|3x + 8| = |4 - 2x|
(3x + 8)² = (4 - 2x)²
(3x + 8)² - (4 - 2x)² = 0
(3x + 8 + 4 - 2x) (3x + 8 - 4 + 2x) = 0
(x + 12) (5x + 4) = 0
x + 12 = 0 atau 5x + 4 = 0
x = -12               5x = - 4
                           x = -4/5

HP = {-12, -4/5}