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anonymous

  • 5 years ago

can someone please help me? i need to simplify this radical... square root of 15a^8 b

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  1. amistre64
    • 5 years ago
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    take out all the perfect squares

  2. amistre64
    • 5 years ago
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    a^4 sqrt(15b)

  3. anonymous
    • 5 years ago
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    dont you first have to find out what perfect square number times a regular number wud give you 15?

  4. anonymous
    • 5 years ago
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    like there is no perfect square that can be multiplied to equal 15.

  5. anonymous
    • 5 years ago
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    \[\sqrt{15a ^8b}\]

  6. amistre64
    • 5 years ago
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    yes; 15 has no perfect square factors :)

  7. anonymous
    • 5 years ago
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    Okay. so what can i do?

  8. amistre64
    • 5 years ago
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    8/2 = 4 so pull out a^4

  9. amistre64
    • 5 years ago
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    sqrt(a^8) means a^8/2 :)

  10. anonymous
    • 5 years ago
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    so ull end up with \[\sqrt{15a ^{4}}b\]

  11. amistre64
    • 5 years ago
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    pull out the a's sqrt(a^8) = a^8/2 = a^4 a^4^2 = aa^8

  12. amistre64
    • 5 years ago
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    \[a^4\sqrt{15b}\]

  13. anonymous
    • 5 years ago
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    i got you.

  14. anonymous
    • 5 years ago
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    so that wud be you answer.

  15. anonymous
    • 5 years ago
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    your***?

  16. amistre64
    • 5 years ago
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    it would; yes

  17. anonymous
    • 5 years ago
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    thank you. so much.

  18. amistre64
    • 5 years ago
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    yw

  19. anonymous
    • 5 years ago
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    wait. one question. just wanted to be sure... \[\sqrt[2]{1000}\] is 100 right?

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