Question

$(a+3) ^{2}$ -9=

Answer 1

(a+3)(a+3)-9
a²+3a+3a+9-9
a²+6a+9-9= a²+6a

Answer 2

(a + 3)² - 9
= (a+3) (a+3) - 9
= a² + 3a + 3a + 9 - 9
= a² + 6a
= a (a + 6)