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in Algebraic Expressions by (31.2k points)
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If (x + 1/x) = 5, then (x2 + 1/x2) = ?

A. 25

B. 27

C. 23

D. 25 1/25

1 Answer

+1 vote
by (30.8k points)
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Best answer

We know that,

From formula, (a + b)2 = a2 + b2 + 2ab

And x + \(\frac{1}{\text{x}}\) = 5, given,

Putting value of x + \(\frac{1}{\text{x}}\)in equation (i), we get, 

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