Question

(a+3)(a+3)
(a+9)(a+9)
(3+a+b)(3+a+b)
(3b-4a)(3b-4a)
(b+4a)(b+4a)
(-4a+b)(-4a+b)

Answer 1

Answer:

all above questions can be solved by using (a+b)2=a2+b2+2ab

1. (a+3)(a+3)=(a+3)2

a2+9+6a