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x² - 6x + 9 > 5 - x
x² - 5x + 4 > 0
(x - 1)(x - 4) > 0
pembuat nol
x = 1 atau x = 4
+ + + | - -- - | + + +
1 4
x < 1 atau x > 4 .................(1)
√(5 - x)≥ 0
5 - x ≥ 0
x ≤ 5 ................................(2)
Dari (1) dan (2) diperoleh
Hp = {4 < x ≤ 5}