Question

solve :- x²-y²-1+y²-1-x²+1-x²-y².​

Answer 1

Answer:

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

Step-by-step explanation:

Now, change into like terms

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

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

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