Question

I have explained the above formula here if my explaination is incorrect me:
(a+b)*(a+b)
a + b
+ a + b
------------
$\: \: \: \: \: {b}^{2} + ab$
${a}^{2} + \: \: \: \: ab$
$= {a}^{2} + {b}^{2} + 2ab$
If the above explaination is incorrect please explain me here:

Answer 1

(a+b)^2 =a^2 + b^2 + 2×a×b
= a^2 + b^2 + 2ab