Question

expand the following. (a² - b² )².​

Answer 1

Answer:

Using the identity (a+b)

2

=a

2

+b

2

+2ab

We get, (a

2

+b

2

)

2

=(a

2

)

2

+(b

2

)

2

+2(a

2

)(b

2

)

=a

4

+b

4

+2a

2

b

2