Question

Add the given expression
$x {}^{2} - y {}^{2} - 1$
$y {}^{2} - 1 - x {}^{2}$
$1 - x {}^{2} - y {}^{2}$



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Answer 1

$\huge\color{cyan}\boxed{\colorbox{black}{✿Answer✿}}$

$\:\:\:\:\:x {}^{2} - y {}^{2} - 1$

+$\:\:\:\:y {}^{2} - 1 - x {}^{2}$

+$\:\:\:1 - x {}^{2} - y {}^{2}$

$--------$

$\:\:\:-x {}^{2}- y {}^{2}-1$

Answer 2

Hope it Helps!

Have a great day ahead!