Question

Factorise:a²-b²-c²-2bc​

Answer 1

Answer:

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

Step-by-step explanation:

a²- (b²+ c²+ 2bc)

a²-(b+c)²

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

Answer 2

1. a²-(b+2bc+c)
2. a²-(b+c)² , now by using the identity a² - b²= (a+b)(a-b)
3. (a-b+c)(a+b+c) ......... I hope this helped you.....