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    Must be gettin kinda annoying to everyone. Sorry :rolleyes:

    Prove that (√2-1)/(√2+1) = 3-2√2

    Thanks.
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    (Original post by MJ_23)
    Prove that (√2-1)/(√2+1) = 3-2√2
    Multiply top and bottom by (√2-1):

    (√2-1)/(√2+1) = (2 - 2√2 + 1)/1 = 3 - 2√2

    as required
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    (Original post by MJ_23)
    Must be gettin kinda annoying to everyone. Sorry :rolleyes:

    Prove that (√2-1)/(√2+1) = 3-2√2

    Thanks.
    that's rationalising the denominator... it's P1! which means we're meant to know it!
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    Thanks a lot.

    (Original post by kimoni)
    that's rationalising the denominator... it's P1! which means we're meant to know it!
    I know, my Brain is that shot. A good nights rest will hopefully help me
 
 
 

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