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    qwertyuioop's Avatar
    qwertyuioop Posts: 87, Reputation: 1
    Junior Member
    		  
    #1

    Jun 14, 2012, 07:19 AM
    simplify
    (5xy^7)^3
    I'm not sure if I'm doing this write can u tell me if I am?

    (5)^3 (x)^3 (y^7)^3
    now it gets complicated what do I do after?
    do I do this?
    125x^37^343
    is this correct??
    RajivShank's Avatar
    RajivShank Posts: 1, Reputation: 1
    New Member
    		  
    #2

    Jun 14, 2012, 07:38 AM
    You are half way correct.
    When you remove the Whole bracket the powers just gets mutiplied by itself. So its 7*3 = 21.
    The Answer is = 125 X^3 Y^21.
    qwertyuioop's Avatar
    qwertyuioop Posts: 87, Reputation: 1
    Junior Member
    		  
    #3

    Jun 14, 2012, 07:41 AM
    got it but y do times 7 x 3=21
    y not 7x7x7=343
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