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Kuadratkan kedua ruas
(7 - x)² > x - 1
49 - 14x + x² > x - 1
x² - 15x + 50 > 0
(x-5)(x-10) > 0
x < 5 atau x > 10
Syarat akar :Tidak boleh negatif:
x - 1 ≥ 0
x ≥ 1
Sehingga,
HP = {x | 1 ≤ x < 10, x E R}