Question

factorise the following:
a^2-2ab+b^2-9c^2

Answer 1

Answer:

(a-b+3c)(a-b-2c)

Step-by-step explanation:

(a-b)^2- (3c)^2

(a-b+3c)(a-b-2c) {by using (a^2-b^2)=(a+b)(a