Question

its (a+b)^2=a^2+b^2+2ab is it right ...

Answer 1

Yes its absolutely correct.
(a+b)²
Simplifying the question we get
=a²+ab+ab+b²
=a²+2ab+b²

Answer 2

yes its correct answer.
(a+b)square = a square +b square + 2ab.   its correct answer.

ex :- if  (a-b) square = a square + bsquare - 2ab.............