Question

add x³-y²-1,y²-1-x²,1-x³-y²
​

Answer 1

Answer:

- x² - y² - 1

Step-by-step explanation:

x³ - y² - 1 + y² - 1 - x² + 1 - x³ - y²

= x³ - x³ - x² - y² - y² + y² - 1 - 1 + 1

= x³ - x³ - x² - 2y² + y² - 2 + 1

= 0 - x² - y² - 1

= - x² - y² - 1