Question

If a square - 5a + 1 = 0 then what is a square +1/a square

Answer 1

bonjour dear!

here is your answer

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a² - 5a - 1 = 0 ⇒a² - 1 = 5a  

(a)² - 1/(a)² = (a - 1/a)² + 2 = (a² - 1)²/(a²) + 2 = (5a)²/(a²) + 2 = 25 + 2 = 27

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Answer 2

$\textbf{Answer is in Attachment !}$