Ne folosim de "tehnicile" invatate : (a-b)^2=a^2-2ab+b^2
UNDE A= RADICAL 2
B=2
(RAD.2-2)^2=2- (4radical2) + 4 = 6 - 4radical2
(Rad.2-1)^2=2- 2radical2 +1=3- 2radical2
T- d(asa am notat ecuatia) = 6-4radical2-3+2radical2 =3-2radical2
Si cum putem observa....(rad.2-1)^2= 3-2radical2...astfel am demonstrat ca este echivalenta!
