Question:
Factors of x⁴ - 4y⁴ are:

Option A):
(x – y), (x + y), (x² + 4y²)
Option B):
(x² - 2y²), (x² + 2y²)
Option C):
(x – 2y),(x² + 2y²)
Option D):
(x - y),(x + y)(x² - 4y²)

Correct Answer is Option B):
(x² - 2y²), (x² + 2y²)