• A. $x^2-1=0$
• B. $x^2-8x+1=0$
• C. $x^2+1=0$
• D. $x^2+8x+1=0$

Answer: Option C

Explanation:

• A. $-\frac{12}{5}$
• B. $\frac{13}{4}$
• C. $\frac{12}{5}$
• D. $-\frac{13}{4}$

Answer: Option D

Explanation:

• A. 1
• B. -1
• C. 2
• D. -2

Answer: Option A

Explanation:

• A. $0$
• B. $x^2+1=0$
• C. $-1$
• D. $no real root$

Answer: Option D

Explanation:

• A. (–6, −12)
• B. (6,12)
• C. (-6,12)
• D. (6,-12)

Answer: Option C

Explanation:

• A. বাস্তব ও সমান
• B. বাস্তব ও অসমান
• C. অবাস্তব ও অসমান
• D. অবাস্তব ও সমান

Answer: Option C

Explanation:

• A. $\frac{2}{5}$
• B. $\frac{3}{5}$
• C. $\frac{5}{3}$
• D. $-\frac{2}{5}$

Answer: Option A

Explanation:

• A. 2
• B. -1
• C. -3
• D. 1

Answer: Option C

Explanation:

• A. 6,2
• B. 6,-2
• C. -6,2
• D. -6,-2

Answer: Option B

Explanation:

• A. -2< k ≤ 2
• B. -2 ≤ k ≤2
• C. -2
• D. -2 ≤ k <2

Answer: Option B

Explanation:

• A. $\left(-2\sqrt{3},2\sqrt{3}\right)$
• B. $\left(-\infty ,-2\sqrt{3}\right)$
• C. $\left(-\infty ,-2\sqrt{3}\right)\cup \left(2\sqrt{3},\infty \right)$
• D. $\left(2\sqrt{3},\infty \right)$

Answer: Option C

Explanation:

• A. $8$
• B. $10$
• C. $12$
• D. $142$

Answer: Option D

Explanation:

• A. $(-\infty , 1)$
• B. $(1.2)$
• C. $[1,2]$
• D. $[2, \infty )$

Answer: Option C

Explanation:

• A. $(2,3)$এবং $4$
• B. $(2,3)$এবং $5$
• C. $(2,-3)$এবং $2\sqrt{5}$
• D. $(2,3)$এবং $2\sqrt{5}$

Answer: Option D

Explanation:

• A. 5
• B. -5
• C. 6
• D. -6

Answer: Option A

Explanation: