• A. $1$
• B. $1/2$
• C. $1/4$
• D. $2$

Answer: Option D

Explanation:

• A. $x=\frac{2}{7}$
• B. $x=\frac{7}{2}$
• C. $x=2$
• D. $x=7$

Answer: Option B

Explanation:

• A. $2$
• B. $4$
• C. $6$
• D. $8$

Answer: Option A

Explanation:

• A. $\left(a-b\right)\left(a^2-ab+b^2\right)$
• B. $\left(a+b\right)\left(a^2-ab+b^2\right)$
• C. $\left(a+b\right)\left(a^2+ab+b^2\right)$
• D. $\left(a-b\right)\left(a^2-ab-b^2\right)$

Answer: Option B

Explanation:

• A. $\pm 2$
• B. $\pm \sqrt{6}$
• C. $\pm 2\sqrt{2}$
• D. $\pm 3$

Answer: Option C

Explanation:

• A. $2$
• B. $0$
• C. $5$
• D. $8$

Answer: Option B

Explanation:

• A. $1$
• B. $0$
• C. $8$
• D. $9$

Answer: Option B

Explanation:

• A. $2$
• B. $8$
• C. $16$
• D. $15$

Answer: Option D

Explanation:

• A. $x+y+1$
• B. $x-y+2xy$
• C. $x+y-1$
• D. $x-y-1$

Answer: Option C

Explanation:

• A. $2$
• B. $1$
• C. $3$
• D. $4$

Answer: Option B

Explanation:

• A. 4
• B. 6
• C. 3
• D. 2

Answer: Option D

Explanation:

• A. $-c^2$
• B. $c^2$
• C. $bc$
• D. $ca$

Answer: Option B

Explanation:

• A. $6$
• B. $7$
• C. $8$
• D. $9$

Answer: Option C

Explanation:

• A. $0$
• B. $1$
• C. $a+b+c$
• D. $-1$

Answer: Option A

Explanation:

• A. $40$
• B. $36$
• C. $32$
• D. $30$

Answer: Option B

Explanation: