x²
- 3x + 2<0
Solve the inequality
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x² - 3x + 2 < 0
⇒x² - x - 2x + 2 < 0
⇒x(x - 1) -2(x - 1) < 0
⇒(x - 1)(x - 2) < 0
∴1 < x < 2
∴x ∈ (∞, 1)U(2, -∞)
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