Answer:
x⁴ - y⁴= (x²)²- (y²)² = (x² + y²)(x²- y²) = (x²+y²)(x)²-(y)²=(x²+y²)(x+y)(x-y)
49x²-16/25= (7x)²- (4/5)²=(7x+4/5)(7x-4/5)
(7x + 4/5)(7x - 4/5)
Step-by-step explanation:
iv. 49x² - 16/25
= (7x)² - (4/5)²
= (7x + 4/5)(7x - 4/5)
