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[√(x²-x)]² < (√2)²
x² -x < 2 dengan pembatas x²-x > 0 --> x(x-1) > 0 , x < 0 atau x > 1
x²- x - 2 < 0
(x -2)(x+1) < 0
(x < 2 atau x > - 1) ∩ (x < 0 atau x > 1)
HP x = -1 < x < 0 atau 1 < x < 2