Question

add x2-y2 -1, y2-1-x2, 1-x2-y2
step by step explanation ​

Answer 1

ANSWER : -x²-y²-1

EXPLANATION :

(x²-y²-1) + ( y²-1-x²) + ( 1-x²-y²)

= x²-y²-1+y²-1-x²+1-x²-y²

= (x²-x²-x²)+(y²-y²-y²)+(1-1-1)

= -x²-y²-1

HOPE THIS WILL HELP YOU