mat/117

Simplify the expression completely (9-5 4√6)(7- 4√8).

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asked by amber
  1. Not sure just what

    (9-5 4√6)

    means.

    But, let's ignore the 5 for now and pretend you had

    (9-4√6)(7- 4√8)
    Just expand like any polynomial:
    9*7 - 4√6*7 - 9*4√8 + 4√6*4√8
    63 - 28√6 - 36√8 + 16√48
    Pulling out all the perfect squares, we are left with
    63 - 28√6 - 72√2 + 64√3

    Not sure just how much you want to massage all that.

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    posted by Steve

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