Question

find the sum of

1.)
${x }^{2} - {y}^{2} - 1$
2.)

${y}^{2} - 1 - {x}^{2}$
3.)

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

plzz answer with solutions

Answer 1

ᴴᴱᵞᴬ

ᴴᴱᴿᴱ ᴵˢ ᵀᴴᴱ ᴬᴺˢᵂᴱᴿ :-

ˢᵁᴹ :-

(χ² - у² - 1) + (у² - 1 - χ²) + (1 - χ² - у²)

=> χ² - у² - 1 + у² - 1 - χ² + 1 + χ² - у²

=> χ² - у² - 1

нσρє тнιѕ нєℓρѕ.