Question

if a
$a - \frac{1}{a } = 5 \: find \: the \: value \: of \: {a}^{2} + \frac{1}{ {a}^{2} }$
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Answer 1

Answer:

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Answer 2

$a - \frac{1}{a } = 5$

$( {a - \frac{1}{a} })^{2} = 25$

${a}^{2} + { \frac{1}{a} }^{2} - 2 = 25$

${a}^{2} + { \frac{1}{a} }^{2} = 27$