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Question

If $m - \frac{1}{m} = 5$ , then find $m^{2} + \frac{1}{m^{2}}$
25
30
22
27

A

25

B

27

C

30

D

22

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Solution

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Applying the formula, ${(a - b)}^{2} = a^{2} + b^{2} - 2 a b$

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