Question

Nilai mutlak |2x-1| kuadrat -6|2x-1|-7=0

Answer 1

Verified answer

Jawab

misalkan 
|2x -1| = a

a² - 6a - 7= 0
(a - 7)(a + 1)=0
a = 7 atau a = - 1 (TM)

|2x - 1| = 7

2x - 1 = 7  atau 2x - 1 = -7
2x = 8 atau 2x = - 6
x = 4  atau x = - 3