Question

Please help me fast ​

Answer 1

Answer:

sorry ...this sum looks lil hard to me ....i m feelin sirry for u cuz none our helping u dear

Answer 2

Answer:

b⁴ - a⁴

Step-by-step explanation:

(a² + b²)(- a² + b²)

= (b² + a²)(b² - a²)

Using identity (a+b)(a-b) = a² - b²

= b⁴ - a⁴