need help for solving...
thanks
help - gmat prep -
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- Legendary Member
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Hi !
I am sure this problen has been solved many times! But i could find it myself either
neways !
2^((x+y)^2)/2^((x-y)^2)
2^a/2^b=2^(a-b)
powers simplication :
x^2+y^2+2xy-(x^2+y^2-2xy)
cancel outs and 4xy is left and xy=1
now it is 2^4=16
Vishu
I am sure this problen has been solved many times! But i could find it myself either
neways !
2^((x+y)^2)/2^((x-y)^2)
2^a/2^b=2^(a-b)
powers simplication :
x^2+y^2+2xy-(x^2+y^2-2xy)
cancel outs and 4xy is left and xy=1
now it is 2^4=16
Vishu
-
- Legendary Member
- Posts: 833
- Joined: Mon Aug 04, 2008 1:56 am
- Thanked: 13 times