Question

pls solve the marked question...........​

Answer 1

Answer:

b4 - a4

Step-by-step explanation:

It is known that

(x - y)(x + y) = x² - y²

Therefore, (a² + b²)(-a² + b²) = (b² + a²)(b² - a²) =(b²)² - (a²)²= b4 - a4

Answer 2

Answer:

(b² + a²) ( b² - a²)

(a+b) (a-b) = a²- b²

a = b² , b = a²

(b²)² - (a²)²

b⁴ - a⁴

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