Question

x^4-y^4+x^2-y^2
please answer fast ​

Answer 1

Step-by-step explanation:

by using a²-b²= (a+b)(a-b)

(x²+y²)(x²-y²)+(x+y)(x-y)

again by using a²-b²= (a+b)(a-b)

(x²+y²)[(x+y)(x-y)]+(x+y)(x-y)