Question

8. factories
a2-a+b-b?

Answer 1

Answer:

We know the identity a

2

−b

2

=(a+b)(a−b)

Using the above identity, the given expressiona

2

−b

2

−a+b can be factorised as follows:

a

2

−b

2

−a+b=[(a+b)(a−b)]−1(a−b)=(a−b)(a+b−1)

Hence, a

2

−b

2

−a+b=(a−b)(a+b−1)

Answer 2

Combine like terms

a²-a+b-b

a²-a

Solution

a²-a