1/2√7 + 2√3 - 1/3√7 + √3

Printable View

- Dec 26th 2008, 10:29 PMJoker37Rationalise the denominator and simplify
1/2√7 + 2√3 - 1/3√7 + √3

- Dec 26th 2008, 10:58 PMnzmathman
Is that

or ?

I'll assume its the first one since we are supposed to rationalise a denominator.

Now times top and bottome by to rationalise the denominator. - Dec 26th 2008, 10:58 PMsudha_14easy.....
I think it's :

right?? - Dec 26th 2008, 11:03 PMJoker37
Sorry, I meant:

1/(2√7 + 2√3) - 1/(3√7 + √3)

LOL, I was thinking of putting brackets but hesitated. - Dec 26th 2008, 11:08 PMJoker37
- Dec 26th 2008, 11:15 PMnzmathman

Now to rationalise the denominator times the fraction (bottom and top) by the conjugates of the two surds to make the two factors rational.

Now, I leave it up to you to expand the top... - Dec 26th 2008, 11:32 PMsudha_14
pretty fast....ur reply i mean....

i'm so slow at typing the math tag....