Question

Factorise a4-b4+2b2-1 ​

Answer 1

a⁴-(b⁴-2b²+1)

a⁴-(b²-1)²

using identity

a²-b²=(a-b)(a+b)

(a²-b²+1)(a²+b²-1)

Answer 2

hope it helps !!!!

plzz mark my answer as the BRAINLIEST