-5|x+7|+2=-13 menentukan nilai x pakai cara kuadrat

Materi : Persamaan Mutlak

Pembahasan :
-5|x + 7| + 2 = -13
-5|x + 7| = -15
|x + 7| = 3
(x + 7)² = 3²
(x + 7)² - 3² = 0
(x + 7 + 3)(x + 7 - 3) = 0
(x + 10)(x + 4) = 0
x = -10
x = -4

Hp : {-10 , -4}