What is (4a2-3b2)2 + (3b2-4a2)2 using algebraic identities?

Question

Not sure how to use identities to simplify the question

Answer 1

= (3b^2 -4a^2)^2 +(3b^2 -4a^2)^2

= 2(3b^2 - 4a^2)^2