Question

Find :

1. (a+b) (a+b)
2. (a+b) (a+b) (a+b)
3. ( a-b) (a-b) (a-b) by using the result of part 2

Answer 1

$(a + b) \: (a + b) = {(a + b)}^{2}$
$= {a}^{2} + 2ab + {b}^{2}$

The same way you have to solve the others