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√x² - x < √6
x² - x < 6
x² - x - 6 < 0
(x - 3)(x + 2) < 0
x = 3 x = -2
HP {xl -2 < x < 3, x ∈ R}
No.4
√x - 3 > 5 - x
x - 3 > (5 - x)²
x - 3 > 25 - 10x + x²
0 > x² - 10 x - x + 25 + 3
x² - 11x + 28 < 0
(x - 7)(x - 4) < 0
x = 7 x = 4
HP {xl 4 < x < 7, x ∈ R}
yang lain sama caranya