Simplify: (a2-b2)2
Using identity for simplification of (a2-b2)2
Given: (a2-b2)2
Using the identity
(a–b)2=a2+b2–2ab
(a2–b2)2= (a2)2 +(b2)2– 2×a2×b2
Therefore, (a2–b2)2=a4+b4-2a2b2.