Question

add
x2 - y2 - 1 + y2 - 1 - x2 + 1 - x2 - y2

Answer 1

Answer:

Pulling out like terms

2.1 Pull out like factors :

-x2 - y2 - 1 = -1 • (x2 + y2 + 1)

Trying to factor a multi variable polynomial :

2.2 Factoring x2 + y2 + 1

-x2 - y2 - 1

Answer 2

Answer:

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