Question

(x^2-y^2)(x^4-y^4):(x^2+y^2)(x^4+y^4)

Answer 1

Answer:

x

4

+x

2

y

2

+y

4

=x

4

+2x

2

y

2

+y

4

−x

2

y

2

(Add and subtract x

2

y

2

)

=(x

2

+y

2

)

2

−x

2

y

2

=(x

2

+y

2

)

2

−(xy)

2

=(x

2

+xy+y

2

)(x

2

−xy+y

2

)