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January 28, 2015

January 28, 2015

Posted by **peter** on Tuesday, October 26, 2010 at 7:19am.

How would I rationalize this

I think it would be -

Multiply both sides by 11-root5

then use the foil method on the denominator to give you 55-5root5/121+5root11-5root11-5

the 2 roots would cancel out giving you 55-5root5/12-5

so would the answer be 55-5root5/7

thanks in advance

- math -
**Reiny**, Tuesday, October 26, 2010 at 8:26amyou have a typo and then transcribed that error

should have been

(55 - 5√5)/(121-5)

=(55 - 5√5)/116

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