Solve the following equation for x: log (x 2 - 21) = 2

Given, ⇒ log (x 2 - 21) = 2 ⇒ x 2 - 21 = 10 2 ⇒ x 2 = 100 + 21 ⇒ x 2 = 121 ⇒ x = 11, -11. Hence, x = 11, -11.

Mathematics

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Given,

⇒ log (x² - 21) = 2

⇒ x² - 21 = 10²

⇒ x² = 100 + 21

⇒ x² = 121

⇒ x = 11, -11.

Hence, x = 11, -11.

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