• A. abc
• B. 3abc
• C. 6abc
• D. 9abc

Answer: Option B

Explanation:

• A. -5
• B. 5
• C. 25
• D. -25

Answer: Option B

Explanation:

• A. ১৫
• B. ১৬
• C. ১৮
• D. ২৪

Answer: Option A

Explanation:

• A. $\frac{1}{80}$
• B. $\frac{1}{800}$
• C. $\frac{1}{8000}$
• D. $\frac{1}{8}$

Answer: Option D

Explanation:

• A. $6ax-10ay$
• B. $4x+5y$
• C. $4ax-5ay$
• D. $4x-5y$

Answer: Option D

Explanation:

• A. -6
• B. 3
• C. 6
• D. -3

Answer: Option D

Explanation:

• B. 1
• C. 225
• D. $\frac{1}{225}$

Answer: Option C

Explanation:

• A. $2$
• B. $\frac{1}{2}$
• C. $\frac{1}{8}$
• D. $\frac{1}{16}$

Answer: Option B

Explanation:

• A. $1$
• B. $2$
• C. $5\sqrt{2}$
• D. $6\sqrt{2}$

Answer: Option C

Explanation:

• A. (x+6)(x-5)
• B. (x-5)(x-6)
• C. (x+3)(2x-5)
• D. (2x+5)(x-3)

Answer: Option D

Explanation:

• A. 10
• B. 9
• C. 16
• D. 12

Answer: Option D

Explanation:

• A. ৫
• B. -৫
• C. $\frac{১}{৫}$
• D. $-\frac{১}{৫}$

Answer: Option C

Explanation:

• A. 10
• B. 9
• C. -9
• D. -2

Answer: Option C

Explanation:

• A. $4$
• B. $3$
• C. $2$
• D. $0$

Answer: Option A

Explanation:

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

Answer: Option A

Explanation: