Question

maths formula a+b whole sqaure
1 + 3 ka whole square ​

Answer 1

I think 15 is answer

hope it will help you mate ✌️✌️✌️✌️☺️☺️

Answer 2

........Hello Friend.........

Here is your answer below,

$= > (a + b) {}^{2} = a {}^{2} + b {}^{2} + 2ab \\ = > (3 + 1) {}^{2} = (4) {}^{2} = 16$