• A. a +b + c
• B. a + b - ca - b + c
• C. a - b + ca + b - c
• D. a + b - ca + b + c

Answer: Option B

Explanation:

• A. (a - b)2 -2ab
• B. (a - b)2 - 4ab
• C. (a + b)2 + 2ab
• D. (a + b)2 - 2ab

Answer: Option D

Explanation:

• A. (a - b - 1) (a + b - 1)
• B. (a - b + 1) (a + b - 1)
• C. (a + b - 1)
• D. (a - b + 1)

Answer: Option B

Explanation:

• A. -b2
• B. b
• C. b3
• D. -a

Answer: Option A

Explanation:

• A. (a + b + c) (a - b + c)
• B. (a - b + 2c) (a + b + c)
• C. (a + b - 2c) (a - b + 2c)
• D. (a2 + b2 - 2c) (a - b + 2c)

Answer: Option C

Explanation:

• A. (a - b + c) (a - b + c)
• B. (a + b + c) (a + b - c)
• C. (a + b + c) (a - b - c)
• D. (a - b + c) (a - b - c)

Answer: Option D

Explanation:

• A. a + yx
• B. a - yx
• C. x + ay
• D. x - ya

Answer: Option B

Explanation:

• A. a(a-3)
• B. a-3
• C. a
• D. a(a+3)

Answer: Option B

Explanation:

• A. $a\left(a-3\right)$
• B. $a-3$
• C. $a$
• D. $a\left(a+3\right)$

Answer: Option A

Explanation:

• A. 34
• B. 39
• C. 36
• D. 49

Answer: Option A

Explanation:

• A. $\pm 10$
• B. $10$
• C. $\pm 11$
• D. $11$

Answer: Option A

Explanation:

• A. (a+b+c)(a-b+c)
• B. (a-b-c)(a-b+c)
• C. (a-b-c)(a+b-c)
• D. (a+b+c)(a-b-c)

Answer: Option B

Explanation:

• A. a3b(a6 - b6)
• B. a3b3(a6 - b6)
• C. a2b2(a6 - b6)
• D. ab(a5 - b5)

Answer: Option C

Explanation:

• A. ab2ca
• B. ab2cd
• C. b2cad
• D. bd2ac

Answer: Option D

Explanation:

• A. a6 - 1
• B. (a - 1) (a + 1)
• C. 1
• D. a3 - 1

Answer: Option C

Explanation: