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# Again...simple p2 Q? watch

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1. Must be gettin kinda annoying to everyone. Sorry

Prove that (√2-1)/(√2+1) = 3-2√2

Thanks.
2. (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
3. (Original post by MJ_23)
Must be gettin kinda annoying to everyone. Sorry

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!
4. 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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