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anonymous

  • 5 years ago

(sqrt(r)-sqrt(s))/(sqrt(r)+sqrt(s)) Rationalize the denominator.

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  1. myininaya
    • 5 years ago
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    multiply by the bottom's conjugate the conjugate of a+b is a-b so the conjugate of sqrt(r)+sqrt(s) is sqrt(r)-sqrt(s)

  2. myininaya
    • 5 years ago
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    if you multiply the bottom, you have to multiply the top though

  3. myininaya
    • 5 years ago
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    \[\frac{\sqrt{r}-\sqrt{s}}{\sqrt{r}+\sqrt{s}}\frac{\sqrt{r}-\sqrt{s}}{\sqrt{r}-\sqrt{s}}=\frac{r-2\sqrt{r}{s}+s}{r-s}\]

  4. myininaya
    • 5 years ago
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    that sqrt should be over rs

  5. anonymous
    • 5 years ago
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    Thank very much for showing me how to do this problem.

  6. myininaya
    • 5 years ago
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    np to rationalize the denominator just multiply what you have in the bottom with the sign change in the middle (do it to top and bottom) does that make sense?

  7. anonymous
    • 5 years ago
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    Yes, thank you very much:)

  8. myininaya
    • 5 years ago
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    :)

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