Math, asked by Xarif, 5 months ago

plz solve this, thank you very much :)

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Answered by Anonymous

2

Answer: √21

Step-by-step explanation:

a + 1/a = 5

(a + 1/a)² = 5²

a² + 1/a² + 2 = 25

a² + 1/a² + 2 - 4 = 25 - 4

a² + 1/a² - 2 = 21

(a - 1/a)² = 21

a - 1/a = √21

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