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    webb2red's Avatar
    webb2red Posts: 3, Reputation: 1
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    #1

    Apr 18, 2012, 08:25 PM
    Exponents... again
    Can you explain the solution for 5
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    webb2red Posts: 3, Reputation: 1
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    #2

    Apr 18, 2012, 08:27 PM
    That question did not post correctly. The question was for a solution to 5^x + 15^x.
    ebaines's Avatar
    ebaines Posts: 12,131, Reputation: 1307
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    #3

    Apr 19, 2012, 06:04 AM
    What kind of "solution" are you looking for? Does this help:

    ?
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    webb2red Posts: 3, Reputation: 1
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    #4

    Apr 23, 2012, 05:38 PM
    I follow you until the last number sentence. I'm sure there is some canceling out of terms going on, but where does the 1 come from? I'm just having a mental block!
    ebaines's Avatar
    ebaines Posts: 12,131, Reputation: 1307
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    #5

    Apr 24, 2012, 08:16 AM
    Remember that a(b+c) = ab + ac. For example: 2(3+4) = 2x3 + 2x4 = 6 + 8 =14. So for this problem

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