Question

a^4-b^4+2b^2-1. Factorise

Answer 1

Answer:

(a² + b² - 1) (a²- b²+1)

Step-by-step explanation:

Answer 2

Answer

(a^2-b^2-1^2) (a^2+b^2-1^2)

Step by step explanation

a^4-(b^4+1-2b^2)

(a^2) ^2-(b^2-1^2) ^2

(a^2-b^2-1^2) (a^2+b^2-1^2)