1 . x2-169+y2=0

• A. $16$
• B. $169$
• C. $13$
• D. $14$

Answer: Option C

Explanation:

2 . x2+xy+y2=0

• A. $\frac{2}{5}$
• B. $\frac{3}{5}$
• C. $\frac{5}{3}$
• D. $-\frac{2}{5}$

Answer: Option A

Explanation:

3 . y2=0

• A. $-4$
• B. $0$
• C. $1$
• D. $4$

Answer: Option B

Explanation: