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√(x-2)² = 4
lalu dikuadratkan menjadi
(x-2)² = 4²
x² - 4x + 4 = 16
x² - 4x - 12 = 0
(x- 6) (x+2) = 0
x = 6 atau x = -2
2. √(x-1)² ≤ 5
dikuadratkan menjadi
(x-1)² ≤ 5²
x² - 2x + 1 ≤ 25
x² - 2x - 24 ≤ 0
(x-6) (x+4) ≤ 0
Jadi, -4 ≤ x ≤ 6