• A. $-2$
• B. $2$
• C. $1$
• D. $-1$

Answer: Option D

Explanation:

• A. $x^2$
• B. $x$
• C. $-x$
• D. $\pm x$

Answer: Option D

Explanation:

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

Answer: Option C

Explanation:

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

Answer: Option C

Explanation:

• A. $x^9$
• B. $x^{18}$
• C. $x^{27}$
• D. $x^{24}$

Answer: Option A

Explanation:

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

Answer: Option B

Explanation:

• 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:

• 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:

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

Answer: Option B

Explanation:

• A. x+y
• B. x -y
• D. 1

Answer: Option D

Explanation:

• A. $\left(x^2-y^2\right)\left(x^2+xy+y^2\right)$
• B. $x^3-y^3$
• C. $x-y$
• D. $x+y$

Answer: Option A

Explanation:

• A. $\left(x^2-y^2\right)$
• B. $\left(x^{2}xy+y^2\right)$
• C. $x^3-y^3$
• D. $x+y$

Answer: Option A

Explanation:

• A. $x+y+1$
• B. $x-y$
• C. $x+y-1$
• D. $x-y-1$

Answer: Option C

Explanation:

• A. $x+y+1$
• B. $x-y+1$
• C. $x-y-1$
• D. $x-y$

Answer: Option B

Explanation:

• A. $x+y+1$
• B. $x+y-1$
• C. $x-y$
• D. $x-y-1$

Answer: Option B

Explanation: