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Verified answer
X² + 2x > 3x² + 2x - 3 > 0
(x + 3)(x - 1) > 0
x < -3 atau x > 1
HP : {x| x < -3 atau x > 1, x ∈ R}
x² - 25 < 0
(x + 5) (x - 5) < 0
-5 < x < 5
HP : {x| -5 < x < 5, x ∈ R}