Question

5. simplify.<br />a) (x² + y² +1) (x² + y ²-1)​

Answer 1

Answer:

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

x^4+y^4+2x^2y^2-1

Use identity (a+b)(a-b)

Step-by-step explanation:

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

x^4+y^4+2x^2y^2-1

Use identity (a+b)(a-b)