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Homework Help: Rationalize expressions

  1. Oct 6, 2006 #1
    The question states

    Rationalize each of the following numerators to obtain and equivalent expression.

    (sqroot(h^2+5h+4) -2 ) / h

    How do i rationalize the numerator here.

    I don't remember

    thanks
     
  2. jcsd
  3. Oct 6, 2006 #2

    arildno

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    Expand your fraction with the conjugate of the numerator.
     
  4. Oct 6, 2006 #3
    thanks a million

    i feel dumb
     
  5. Oct 6, 2006 #4
    actually im not gettin the answer that matches the back

    the ans in the back says

    (h+5) / (sqroot(h^2+5h+4) +2)



    i get like (h^2+5h -4) / h^2
     
  6. Oct 6, 2006 #5

    arildno

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    Careful about that conjugate!
    You are to multiply your fraction with:
    [tex]1=\frac{\sqrt{h^{2}+5h+4}+2}{\sqrt{h^{2}+5h+4}+2}[/tex]
     
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