Question

$\LARGE\tt\underline\green{Questiøn}$
Add the following:
x² - y² - 1 , y² - 1 - x²
_________________
Need correct answer.
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Answer 1

Answer:

$\huge \underbrace{ Answer✿°᭄}$

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

$\huge \underline{hope \: it \: helps \: u}$