Question

Factorise
a) a raise to 4 - b raise to 4

Answer 1

Step-by-step explanation:

a^4 -b^4

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

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

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