# area

• Jan 15th 2010, 07:11 AM
andyboy179
area
hi, my question is to find the area of this rectangle, im not sure how to work it out so could anyone help?

i think the answer would be 2?

Attachment 14829
• Jan 15th 2010, 07:34 AM
skeeter
Quote:

Originally Posted by andyboy179
hi, my question is to find the area of this rectangle, im not sure how to work it out so could anyone help?

i think the answer would be 2?

Attachment 14829

$\displaystyle (a+b)(c-d) = ac - ad + bc - bd$

$\displaystyle (1+\sqrt{3})(2-\sqrt{3}) = 2 - \sqrt{3} + 2\sqrt{3} - 3 = \sqrt{3} - 1$
• Jan 15th 2010, 07:38 AM
andyboy179
could you explain how you got that please?
• Jan 15th 2010, 07:56 AM
skeeter
Quote:

Originally Posted by andyboy179
could you explain how you got that please?

I thought I did ...
• Jan 15th 2010, 07:59 AM
andyboy179
well i don't understand how you got that, how did (1+root3)(-2root3) end up as 2- root3 + 2 root3-3
• Jan 15th 2010, 08:02 AM
skeeter
Quote:

Originally Posted by andyboy179
well i don't understand how you got that, how did (1+root3)(-2root3) end up as 2- root3 + 2 root3-3

read a lesson and find out how ...