Question

Factorise completely 162 - 2a^4 b^4

Answer 1

i gotten 2(81 - a^4 b^4)
2(3^4 - a^4 b^4)
Then im confused :(

Answer 2

You can factor the second part as the difference of two squares:
2 (9+a▲2 b▲2) (9 - a▲2 b▲2)

Answer 3

Oh yea... i missed that :P is it possible to do this? 2(9+a^2b^2)(3-ab)(3+ab)

Answer 4

Oh yes. I missed that! :)

Answer 5

Thanks :)