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2yoututu11

  • 3 years ago

Which is a rational number? A. B. C. D.

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  1. 2yoututu11
    • 3 years ago
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    \[A. \sqrt{8}\]

  2. anonymous
    • 3 years ago
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    nope, \[\sqrt{8}=2\sqrt{2}\] and \[\sqrt{2}\]is irrational

  3. 2yoututu11
    • 3 years ago
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    \[B. \sqrt{16}\]

  4. anonymous
    • 3 years ago
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    in fact \(\sqrt{a}\) is always irrational UNLESS \(a\) is a perfect square, like for example 16

  5. 2yoututu11
    • 3 years ago
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    \[C.\sqrt{18}\]

  6. 2yoututu11
    • 3 years ago
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    \[D.\sqrt{20}\]

  7. BriannaD
    • 3 years ago
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    16 i believe

  8. 2yoututu11
    • 3 years ago
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    thank you

  9. BriannaD
    • 3 years ago
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    wellcome~

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