How to factorise: a^4 -a^2b^2 - 2b^4=0 ?

1 Answer
Feb 25, 2018

(a^2-2b^2)(a^2+b^2)=0

Explanation:

This can be treated in the same way as a quadratic.
Factorise it first

The factors of 2 are 2 and 1

a^4-a^2b^2-2b^4 =0

(a^2-2b^2)(a^2+b^2)=0