প্রশ্নঃ
সমাধান করুনঃ x2 - 2x - 15 > 0 .
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ক.
s = (x : x > 5 অথবা x < -3)
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খ.
s = (x : x < 5 অথবা x > -3)
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গ.
s = (x : x > 5 অথবা x > -3)
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ঘ.
s = (x : x < 5 অথবা x < -3)
উত্তরঃ ক
 s = (x : x > 5 অথবা x < -3) খ) s = (x : x < 5 অথবা x > -3) গ) s = (x : x > 5 অথবা x > -3) ঘ) s = (x : x < 5 অথবা x < -3) উত্তর: ক) s = (x : x > 5 অথবা x < -3)
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