Yahoo Answers is shutting down on May 4th, 2021 (Eastern Time) and beginning April 20th, 2021 (Eastern Time) the Yahoo Answers website will be in read-only mode. There will be no changes to other Yahoo properties or services, or your Yahoo account. You can find more information about the Yahoo Answers shutdown and how to download your data on this help page.

Trending News

Promoted
Kewl kid
Kewl kid asked in Science & MathematicsMathematics · 1 decade ago

Algebra II rationalize question?

Can someone answer this please? (Just this one.)

1 - 1/√5

----------------

1 + 1/√5

(In words)

1 minus 1 over squareroot of 5, OVER 1 plus 1 over square root of 5.

Thanks.

Type square root by copying this √ or pressing num lock on. Then hold ALT and press 251 on the number pad.

Again, thanks.

2 Answers

Relevance
  • Cobra
    Lv 4
    1 decade ago
    Favorite Answer

    1 - 1/√5

    ----------------

    1 + 1/√5

    (1 - 1/√5)^2

    =------------------------------

    (1 + 1/√5)(1 - 1/√5)

    (6/5-2/√5)

    = ------------------

    1-1/5

    ((6-2√5)/5)

    = --------------------

    4/5

    =(6-2√5)/4

  • Anonymous
    1 decade ago

    This a good exam question and there are several pitfalls you want to avoid in solving this type of problem.

    To answer your question visually, Dr. Pan (MathDoc) has recorded a YouTube video. Please follow the link below:

    Source(s): http://www.youtube.com/watch?v=wtIRV2xlf4U
Still have questions? Get your answers by asking now.