Question

1. | 2x + 1 | = 5
2.| 2x-7 | = 3​

Answer 1

Verified answer

Penjelasan dengan langkah-langkah:

Nomor 1)

|2x + 1| = 5 untuk x < 0

-(2x + 1) = 5

-2x - 1 = 5

-2x = 5 + 1

-2x = 6

x = 6/-2

x = -3

|2x + 1| = 5 untuk x ≥ 0

2x + 1 = 5

2x = 5 - 1

2x = 4

x = 4/2

x = 2

HP{-3, 2}

Nomor 2)

|2x - 7| = 3 untuk x < 0

-(2x - 7) = 3

-2x + 7 = 3

-2x = 3 - 7

-2x = -4

x = -4/-2

x = 2

|2x - 7| = 3 untuk x ≥ 0

2x - 7 = 3

2x = 3 + 7

2x = 10

x = 10/2

x = 5

HP{2, 5}

Answer 2

Penjelasan dengan langkah-langkah:

1.

l2x + 1l = 5

2x + 1 = 5

2x = 5 - 1

2x = 4

x = 4/2

x = 2

2.

l2x - 7l = 3

2x - 7 = 3

2x = 3 + 7

2x = 10

x = 10/2

x = 5