x2 - 3x + 2 < 0 অসমতাটির সমাধান কোনটি?

A 1 < x < 2

B - 2 < x < - 1

C - 2 < x ≤ - 1

D 1 ≤ x ≤ 2

Solution

Correct Answer: Option A

x2 - 3x + 2 < 0
⇒ x2 - x - 2x + 2 < 0
⇒ x(x - 1) - 2(x - 1) < 0
⇒ (x - 1)(x - 2) < 0

∴ অসমতাটির সমাধান: 1 < x < 2

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