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Math Help - area

  1. #1
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    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?

    area-maths.jpg
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  2. #2
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    Quote Originally Posted by andyboy179 View Post
    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?

    Click image for larger version. 

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

    (1+\sqrt{3})(2-\sqrt{3}) = 2 - \sqrt{3} + 2\sqrt{3} - 3 = \sqrt{3} - 1
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  3. #3
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    could you explain how you got that please?
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  4. #4
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    Quote Originally Posted by andyboy179 View Post
    could you explain how you got that please?
    I thought I did ...
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  5. #5
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    well i don't understand how you got that, how did (1+root3)(-2root3) end up as 2- root3 + 2 root3-3
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  6. #6
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    Quote Originally Posted by andyboy179 View Post
    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 ...

    Adding (and Subtracting) Square Roots
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  7. #7
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    don't worry i will try and find out at school
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