(x + 9)(x - 2) - (x - 2)² > 0
(x - 2)(x + 9 - x + 2) > 0
(x - 2) * 11 > 0
x - 2 > 0
x > 2
x ∈ (2 ; + ∞)
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(x + 9)(x - 2) - (x - 2)² > 0
(x - 2)(x + 9 - x + 2) > 0
(x - 2) * 11 > 0
x - 2 > 0
x > 2
x ∈ (2 ; + ∞)