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Math Help - Radical numbers with fractions...

  1. #1
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    Radical numbers with fractions...

    Okay, so this is due tomorrow...

    Here goes! Its 8th grade Algebra, 1 and 2, although this is supposed to be 1.

    There is a 10 to the left, and then a radical expression of 20/64 (as a fraction) inside the radical sign..

    I really should get this, since we did it in class, but Im totally cunfuzzled at the moment.
    Last edited by Aeriska; September 29th 2008 at 05:30 PM. Reason: I spelled should wrong :)
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  2. #2
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    Hello, Aeriska!

    Simplify: . 10\sqrt{\frac{20}{64}}

    First, reduce the fraction: . 10\sqrt{\frac{5}{16}}

    Make "separate" square roots: . 10\cdot\frac{\sqrt{5}}{\sqrt{16}}

    Since \sqrt{16} = 4, we have: . 10\cdot\frac{\sqrt{5}}{4}

    Reduce, and we get: . 5\cdot\frac{\sqrt{5}}{2}\:\text{ or }\:\frac{5\sqrt{5}}{2}

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  3. #3
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    Thanks so much. Got it right xD But I dont know how to do the actual math symbols that you did, in typing.
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  4. #4
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  5. #5
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    Ever so helpful. Thankies ^^
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