Question

Factorise
a) p4-81
b) a4-by
slove this and get 10 point​

Answer 1

Answer:

a) (p^2)^2 - (9)^2

using the identity a^2-b^2= (a+b)(a-b)

(p^2 + 9)( p^2 -9)

( p^2 + 9) ( p+3)(p-3)