PlanetMath (more info)
 Math for the people, by the people. Sponsor PlanetMath
Encyclopedia | Requests | Forums | Docs | Wiki | Random | RSS  
Login
create new user
name:
pass:
forget your password?
Main Menu
[parent] Viewing Message
``Re: Proof'' by rspuzio on 2007-12-24 12:27:36
Rewrite the binomial formula as follows:

sqrt (x^2 + y^2 + 2xy) = x + y

Let x be one of the square roots appearing on the
right-hand-side of the formula you are trying
to prove and let y be the other square root.
After a bit of simplification, you will see
that x^2 + y^2 + 2xy = a + sqrt(b).
[ reply | up | top ]
Interact
reply