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Math Help - Simplifying SquareRoots

  1. #1
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    Simplifying SquareRoots

    A review question I'm not sure how to answer, the question says to add or subtract whenever possible and to simplify the answer.

     <br />
3\sqrt{50}+4\sqrt{72}<br />
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  2. #2
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    You need to find square numbers inside the square root i.e 1,4,9,16,25,36,... to help simplify.


     <br />
\sqrt{72} = \sqrt{2\times 36} = \sqrt{2}\times\sqrt{36} = \sqrt{2}\times 6 = 6\sqrt{2}<br />

    Now do the same for the first term and finish.
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  3. #3
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    \sqrt{72} = 6\sqrt{2}
    and
    \sqrt{50} = 5\sqrt{2}

    but what happens with the 3 and 4, I multiply them with the 6 and 5?
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  4. #4
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    oh wait, i got the answer

    thank you so much
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