|10 – 4x| ≥ 2
|10 – 4x| ≥ 2
Jawab:
|10 – 4x| ≥ 2
|10 – 4x|² ≥ 2²
16x² – 80x + 100 ≥ 4
16x² – 80x + 100 – 4 ≥ 0
16x² – 80x + 96 ≥ 0
x² – 5x + 6 ≥ 0
(x – 3) (x – 2) ≥ 0
x = 3 atau x = 2
Hp = {x ≤ 2 atau x ≥ 3}
Jawab:
|10 – 4x| ≥ 2
|10 – 4x|² ≥ 2²
16x² – 80x + 100 ≥ 4
16x² – 80x + 100 – 4 ≥ 0
16x² – 80x + 96 ≥ 0
x² – 5x + 6 ≥ 0
(x – 3) (x – 2) ≥ 0
x = 3 atau x = 2
Hp = {x ≤ 2 atau x ≥ 3}
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