The square of a certain number plus ten is equal to 81

Meisenman asked Sep 5, 2023

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Meisenman asked Sep 5, 2023

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27 votes

Answer:

x = ±8.43 (to 3sf)

Explanation:

Let this number be x.

x² + 10 = 81

x² = 81 - 10

= 71

x = ±√71

= ±8.43 (to 3sf)

Ghostmansd answered Sep 10, 2023

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