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Math Help - one more radical question. I think I did this wrong also

  1. #1
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    one more radical question. I think I did this wrong also

    13^2 -(4)(-3)(-4) all under a radical sign. do I combine the 4 the -3 and the -4 to get 48 and then subtract from 169, and get 121 under a radical sign equaling 11
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  2. #2
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    Re: one more radical question. I think I did this wrong also

    Yes.
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