Most gondolj bele: a*(a+b)^2 = a*(a+b)*(a+b) = (a^2+ab)*(a+b) =/= (a^2+ab)^2.
Serbia is like Nokia: each year a new model, and it's getting smaller.
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Serbia is like Nokia: each year a new model, and it's getting smaller.
I wish I could have known about the view from halfway down
I wish I could have known about the view from halfway down
). Megkapod az optimális a-t. Utána pedig kiszámolod vele azt a mértani középértéket, amit kérdez a feladat. 
Serbia is like Nokia: each year a new model, and it's getting smaller.

I wish I could have known about the view from halfway down