• A. $4$
• B. $9$
• C. $16$
• D. $25$

Answer: Option D

Explanation:

• A. $xy$
• B. $x+y$
• C. $xy\left(x+y\right)$
• D. $x^{2}y\left(x+y\right)$

Answer: Option D

Explanation:

• A. 334
• B. 354
• C. 364
• D. 512

Answer: Option C

Explanation:

• A. $x^7-1$
• B. $x^7-1$
• C. $x^6-1$
• D. $x^5-1$

Answer: Option C

Explanation:

• A. $x=1,y=-1$
• B. $x=1,y=1$
• C. $x=-1,y=-1$
• D. $x=-1,y=1$

Answer: Option D

Explanation:

• A. $\frac{x\left(x+1\right)\left(2x+1\right)}{6}$
• B. $\frac{x\left(x+1\right)}{2}$
• C. $x$
• D. ${\left\{\frac{x\left(x+y\right)}{2}\right\}}^2$

Answer: Option A

Explanation:

• A. $9\frac{2}{3}$
• B. $11\frac{1}{3}$
• C. $12\frac{2}{5}$
• D. $13\frac{2}{3}$

Answer: Option C

Explanation:

• A. $\frac{5}{3}$
• B. $\frac{2}{3}$
• C. $\frac{3}{5}$
• D. $\frac{5}{7}$

Answer: Option A

Explanation:

• A. $6$
• B. $8$
• C. $10$
• D. $12$

Answer: Option C

Explanation:

• A. $\frac{1}{2}\left(x-4\right)\left(x+2\right)$
• B. $\frac{1}{2}\left(x+4\right)\left(x-2\right)$
• C. $\frac{1}{2}\left(x+4\right)\left(x+2\right)$
• D. $\frac{1}{2}\left(x-4\right)\left(x-2\right)$

Answer: Option D

Explanation:

• A. $x+2$
• B. $x+4$
• C. $x+3$
• D. $2\left(x+3 \right)$

Answer: Option D

Explanation:

• A. 2
• B. 4
• C. -6
• D. -8

Answer: Option B

Explanation:

• A. $\sqrt{3}$
• B. $1$
• C. $2\sqrt{2}$
• D. $8$

Answer: Option B

Explanation:

• A. $3$
• B. $1$
• C. $0$
• D. $-1$

Answer: Option C

Explanation:

• A. $\frac{2}{5}$
• B. $\frac{1}{3}$
• C. $3$
• D. $5$

Answer: Option D

Explanation: