The answer you are looking for is a² + 2ab + b².
Solution/Explanation:
Writing out the mathematical expression first
(a + b)²
(a + b) (a + b)
a × a = a²
a × b = ab
a × b = ab
b × b = b²
Adding all of these terms together
a² + ab + ab + b²
Combining like terms with "ab" and "ab," to get 2ab.
You will get a² + 2ab + b².
So, therefore, the final answer to this problem is a² + 2ab + b².
Hope that this has helped answer your question for you. Good day.