hi, i need to rationalise the denominator of this,

how would i work this out?

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- January 16th 2010, 02:26 AMandyboy179rationalising denominators
hi, i need to rationalise the denominator of this,

how would i work this out? - January 16th 2010, 02:54 AMpickslides
Here's one I prepared earlier.

Consider

Let's times it by 1 because that won't change anything

But 1 comes in many forms I.e

So lets make it the following

I did this because

Now we have

We have no radical in the denominator so we are finished.

Apply this method to your problem. - January 16th 2010, 03:00 AMandyboy179
- January 16th 2010, 03:09 AMpickslides
- January 16th 2010, 03:13 AMandyboy179
would the answer to my question be, Attachment 14842 ?

- January 16th 2010, 03:23 AMpickslides
Yes, yes it is

(Clapping) - January 16th 2010, 03:26 AMandyboy179
thank you so much, you'd make a great teacher!!!

- January 16th 2010, 03:30 AMandyboy179
oh ye one others thing, is this right? Attachment 14844

- January 16th 2010, 03:34 AMmr fantastic