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Math Help - Radicals

  1. #1
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    Radicals

    Evaluate the SQ root of (2x+1) squared

    2x+1 and the exponent 2 are all underneath the radical

    My answer = 2x+1 ???

    Is this right?
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  2. #2
    A riddle wrapped in an enigma
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    Quote Originally Posted by dempc View Post
    Evaluate the SQ root of (2x+1) squared

    2x+1 and the exponent 2 are all underneath the radical

    My answer = 2x+1 ???

    Is this right?
    You are correct!
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  3. #3
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    Sweet!!.. thanks for checking.. if i have another question pertaining to radicals should i post it under this thread or open a new one?
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  4. #4
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    another question

    The square root of 2 times (x+the sq root of 8)

    the sq root of 2 is outside the parenthesis

    My answer = x sq root of 2 + 4
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  5. #5
    A riddle wrapped in an enigma
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    Quote Originally Posted by dempc View Post
    The square root of 2 times (x+the sq root of 8)

    the sq root of 2 is outside the parenthesis

    My answer = x sq root of 2 + 4
    Hi dempc,

    You are correct.

    You probably should submit a new question in a new post.

    Another suggestion. Try to learn a little LATEX to help present you problems a little better. Just click on the code below to see how this one is constructed.

    \sqrt{2}(x+\sqrt{8})=x\sqrt{2}+\sqrt{16}=x\sqrt{2}  +4
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  6. #6
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    The square root of (2x+ 1)^2 is |2x+ 1|, which is not necessarily equal to 2x+ 1. For example, if x= -2 then 2x+ 1= 2(-2)+ 1= -3 so (2x+1)^2= 3^2= 9. The square root of that is 3, not -3.
    Last edited by mr fantastic; April 23rd 2009 at 06:04 AM. Reason: Fixed a latex tag.
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