rationalizati fractia :1/(√2+1) la puterea a 2a

Rationalizati Fractia 121 La Puterea A 2a class=

Răspuns :

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

3-2√2/9-8 = 3-2√2/1 = 3-2√2