2 |2×-4| - 6 = 10 |2×-5| ≥ 25

jawaban soal diatas.h

Bab Nilai Mutlak
Matematika SMA Kelas X

1] 2 |2x - 4| - 6 = 10
2 |2x - 4| = 10 + 6
|2x - 4| = 16 : 2
|2x - 4| = 8

2x - 4 = 8
2x = 8 + 4
x = 12 : 2
x = 6

2x - 4 = -8
2x = -8 + 4
x = -4 : 2
x = -2

{ -2, 6 }

2] |2x - 5| ≥ 25

2x - 5 ≤ -25
2x ≤ -25 + 5
x ≤ -20 : 2
x ≤ -10

2x - 5 ≥ 25
2x ≥ 25 + 5
x ≥ 30 : 2
x ≥ 15

x ≤ -10 atau x ≥ 15