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√(x²-2x) < √(3x+6) ; x(x-2) ≥ 0 atau 3x ≥ -6
x²-2x < 3x+6 x ≤ 0 atau x ≥ 2 atau x ≥ - 2
x²-5x-6 < 0
(x-6)(x+1) < 0
-1 < x < 6
maka interval x: -1 < x ≤ 0 atau 2 ≤ x < 6