Missing Numbers - 3

We observe that the right column only contains square numbers, $3^2$ , $5^2$ and $4^2$ . So there must be some way to get $3$ , $5$ and $4$ from the other two numbers in each row. And in fact, $1+2=3$ and $3+1=4$ , so we need $\text{?}+2=25 \Leftrightarrow \text{?}=3$ . This means that "?" should be replaced by 3.

Hey ram if your online solve my little triggy problem... So ,in a row the square of sum of first two numbers gives third number. In second row (x+2)squared gives 25 and From that we get 3 as answer