Question

Factorise (1+x)²(1+y²)-(1-y)²(1+x²)

Answer 1

Answer:

the answer is that it depends on the domain. in the integers, rational numbers and real numbers, the answer is no. However, in the complex numbers, where there is a solution to x^2+1=0, you can factor into (x-i)(x+i), where i^2=-1 (this number is no more imaginary than π).

Step-by-step explanation:

correct answer