Question

Himpunan penyelesaian dari persamaan |2x - 4| = 12 adalah...
A.HP = -8 dan 4
B.HP = 8 dan -4
C.HP = -8 dan -4
D.HP = -4 dan 2
E.HP = -3 dan 4

Answer 1

|2x - 4| = 12

2x - 4 = 12

2x = 12 + 4

2x = 16

x = 16/2

x = 8

atau

2x - 4 = -12

2x = -12 + 4

2x = -8

x = -8/2

x = -4

• HP = {-4, 8}

Answer 2

SOAL 1

|2x - 4| = 12

2x - 4 = 12

2x = 12 + 4

2x = 16

x = 16 ÷ 2

x = 8

2x - 4 = -(12)

2x - 4 = -12

2x = -12 + 4

2x = -8

x = -8 ÷ 2

x = -4

Hp : {8 ; -4}