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anonymous

  • one year ago

can someone help me in irrational number's pool 1

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  1. anonymous
    • one year ago
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    \[\sqrt{?} 81\]

  2. anonymous
    • one year ago
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    it said to simplify

  3. anonymous
    • one year ago
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    Is that negative 81?

  4. anonymous
    • one year ago
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    no it is positve \[\sqrt{81}\]

  5. anonymous
    • one year ago
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    Hmm, just confused because that wouldn't be an irrational number. The answer would just be 9 right?

  6. anonymous
    • one year ago
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    i think so because it's one of the answers on the practice test

  7. anonymous
    • one year ago
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    my teacher give's us random test's do

  8. anonymous
    • one year ago
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    Oh, interesting. Well if it's just Square Root of 81 that's easy to explain! So if you are still having trouble with these what you need to ask yourself is what times itself will get you what's underneath the radical sign. For the example 81, 9*9 does equal 81. Rooting a number like this is the opposite of raising to a power!

  9. anonymous
    • one year ago
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    ohh okay thank you so much now i get it thanks for your help

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