Question

Factorise: a – b – a2 – b2.

Answer 1

Answer:

(a-b)(1-a-b)

Step-by-step explanation:

a – b – a2 – b2.

=(a-b)-(a+b)(a-b)

=(a-b)(1-a-b)

Answer 2

Grouping

(a-a²) - (b-b²)

a(1-1²) + b(1-1²)

a(1-1) + b(1-1)

(a+b) + (1-1)