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Math Help - last one with big numbers

  1. #1
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    last one with big numbers

    ^4√(6a^9) + ^4√(3750a) - ^4√(6a)
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  2. #2
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    Hello, rj2001!

    I understand . . . These are all fourth roots.
    . . I'll drop all the indexes (the 4's).


    ^4√(6a^9) + ^4√(3750a) - ^4√(6a)

    The first radical is: .√(6aa^8) .= .√(a^8)√(6a) .= .a√(6a)

    The second is: .√(6256a) .= .√(625)√(6a) .= .5√(6a)


    And we have: .a√(6a) + 5√(6a) - √(6a) . = . a√(6a) + 4√(6a)

    . . . . . = . (a + 4)√(6a)


    Now you can insert the "4" . . .

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