• A. $20$
• B. $40$
• C. $60$
• D. $80$

Answer: Option B

Explanation:

• A. $3,4$
• B. $3,-4$
• C. $-3,-1$
• D. $-3,4$

Answer: Option D

Explanation:

• A. 144xy
• B. 12xy
• C. 6xy
• D. 24xy

Answer: Option D

Explanation:

• A. ৫
• B. ৪
• C. ৩
• D. ২

Answer: Option D

Explanation:

• A. $a^2+b^2$
• B. $a^2-b^2$
• C. ${(a+b)}^3$
• D. ${(a-b)}^3$

Answer: Option D

Explanation:

• A. $n^2-1$
• B. $n^2$
• C. $n^2+1$
• D. $n^2+2$

Answer: Option B

Explanation:

• A. 1
• B. 2
• C. 3
• D. 4

Answer: Option D

Explanation:

• B. 1
• C. a-b
• D. a+b

Answer: Option B

Explanation:

• A. (6 - a)(4a - 1)
• B. (a - 6)(4a + 1)
• C. (a - b)(4a - 1)
• D. (6 - a)(4a + 1)

Answer: Option D

Explanation: