Question

factorize x^4-y^4+x^2-y^2​

Answer 1

Answer:

(X^2-y^2) (x^2+1)

Step-by-step explanation:

(X^4+x^2)-(y^4+y^2)

X^2(x^2+1)-y^2(y^2+1)

(X^2+1)(x^2-y^2)