x2 + x - 2 ≥ 0 অসমতাটির সমাধান -

A -2 ≤ x ≤ 1  

B -2 < x < 1  

C x ≤ -2 অথবা x ≥ 1 

D x < -2 অথবা x > 1 

Solution

Correct Answer: Option C

x2 + x - 2 ≥ 0
বা, x2 + 2x - x - 2 ≥ 0
বা, x(x + 2) - 1(x + 2) ≥ 0
বা, (x + 2)(x - 1) ≥ 0
বা, x ≤ -2 অথবা x ≥ 1

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