If x²+9/x² =31,what is the value of (x-3/x)?
Solution
Correct Answer: Option D
দেওয়া আছে , x²+9/x² =31
বা,(x)² +(3/x)² =31
বা,(x-3/x)² +2×x × 3/x =31
বা, (x-+6=31
বা,(x-3/x)²=25
∴ (x-3/x )=√25 =5
বা,(x)² +(3/x)² =31
বা,(x-3/x)² +2×x × 3/x =31
বা, (x-+6=31
বা,(x-3/x)²=25
∴ (x-3/x )=√25 =5
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