Question

Factorise: a²- 2ab+b²- c²

(a-b-c)(a +b+c)
(a-b-c)(a-b+c)
(a-b-c) (a-b-c)
(a+b+c)(a +b+c)​

Answer 1

Answer:

(a-b-c)(a-b+c)

Answer is B

Step-by-step explanation:

(a-b-c)(a-b+c)

=a^2-ab+ac+b^2-ba-bc-ca+bc-c^2

=a^2-2ab+b^2-c^2