The sum of the squares of two numbers is 386. If one of

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The sum of the squares of two numbers is 386. If one of the number is 5, the other will be :

Let the required number be x. Then,
x² + 5² = 386
⇒ x² = 386 – 25
⇒ x² = 361
⇒ x = √361 =19