Question

1. Factorise:
$x {}^{4} - y {}^{4}$

plz ans fast ​

Answer 1

Answer:

x^4 - y^4

= (x^2)^2 - (y^2)^2

= (x^2+y^2) ( x^2 - y^2)

= (x^2 + y^2) (x+y) (x-y)