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izzy56658989

  • 3 years ago

the sum of the digits of a certain two-digit number equals the square root of the number? what is the number?

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  1. electrokid
    • 3 years ago
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    conside the number 23 \(23 = 2\times10+3\) so if a number is formed by two digits "a" and "b" then the number is \(a\times10+b\)

  2. electrokid
    • 3 years ago
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    so, the condition in the problem gives us: \[a+b=\sqrt{a\times10+b}\]

  3. izzy56658989
    • 3 years ago
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    thx. you

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