1 . x2-yy-2-1

• A. $\left(x-y-1\right)\left(x-y+1\right)$
• B. $\left(x-y+1\right)\left(x+y-1\right)$
• C. $\left(x+y+1\right)\left(x-y-1\right)$
• D. $\left(x-y\right)\left(x+y+1\right)$

Answer: Option B

Explanation:

2 . x2-yy-2-1

• A. (x - y - 1) (x-y + 1)
• B. (x - y + 1) (x+y -1)
• C. (x + y +1) (x-y - 1)
• D. (x - y) (x + y +1)

Answer: Option B

Explanation: