Question

factorise: (A+2b)^2 - A^2

Answer 1

(A+2B)²-A²
A²+4B²+4AB - A²
= 4B²+4AB = 4B(A+B)

Answer 2

(A+2b+A) (A+2b-A)
(2A+2b) (2b)
2(A+b) (2b)