• A. $x^2-4$
• B. $2\left(x^2-4\right)$
• C. $4\left(x^2-4\right)$
• D. $x+2$

Answer: Option A

Explanation:

• A. $\left[+9,3\right]$
• B. $\left[3,\infty \right]$
• C. $\left[-9,3\right]$
• D. $\left[\infty ,-9\right]$

Answer: Option C

Explanation:

• A. $\left(a^2,b^2\right)$
• B. $\left(a,b\right)$
• C. $\left(0,a\right)$
• D. $\left(a,0\right)$

Answer: Option D

Explanation:

• A. 10
• B. 15
• C. 20
• D. 25

Answer: Option C

Explanation:

• A. 19
• B. 29
• C. 49
• D. 9

Answer: Option C

Explanation:

• A. 2
• B. 8
• C. 6
• D. 4

Answer: Option C

Explanation:

• A. $4x$
• B. $4$
• C. $x$
• D. $1$

Answer: Option D

Explanation:

• A. 7-x
• B. 5-x
• C. 5+x
• D. 12-x

Answer: Option B

Explanation:

• A. $(x-1) (x+6)$
• B. $(x-1) (x+4)$
• C. $(x-1) (x-6)$
• D. $(x+1) (x+6)$

Answer: Option C

Explanation:

• A. x+10
• B. x-10
• C. X-8
• D. x-6

Answer: Option B

Explanation:

• A. $2a^2-5ab-8b^2$
• B. $2a^2-5ab+8b^2$
• C. $2a^2+5ab+8b^2$
• D. কোনোটিই নয়

Answer: Option C

Explanation: