• A. $( \infty , 0 )$
• B. $( - \infty , 4 )$
• C. $( - \infty , 4 )$
• D. $( 0 , 4 )$

Answer: Option C

Explanation:

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

Answer: Option B

Explanation:

• A. 29
• B. 49
• C. 59
• D. 69

Answer: Option C

Explanation:

• A. a+1
• B. b+1
• C. a-2
• D. a-1

Answer: Option D

Explanation:

• A. 35
• B. 54
• C. 45
• D. 55

Answer: Option B

Explanation:

• A. (2a-3)
• B. (2a+3)
• C. (a-3)
• D. (3a+2)

Answer: Option A

Explanation:

• A. (1-x)(1-7x)
• B. (1-x)(1+7x)
• C. (1+x)(1-7x)
• D. (1+x)(1+7x)

Answer: Option B

Explanation:

• A. $\frac{1}{2}<x<1$
• B. x<1/2 এবং x>1
• C. x<1 এবং x>1/2
• D. x=1

Answer: Option B

Explanation:

• A. $x+3$
• B. $x+4$
• C. $x-3$
• D. $x+6$

Answer: Option A

Explanation:

• A. $b^2-4ac=0$
• B. $b^2-4ac>0$
• C. $b^2-4ac<0$
• D. $b^2-4ac\#0$

Answer: Option A

Explanation:

• A. $x^2-x+1$
• B. $x^2+x-1$
• C. $x^3-1$
• D. $x^2-x-1$

Answer: Option B

Explanation:

• A. (3x+7)(x+2)
• B. (3x-7)(x+2)
• C. (3x+7)(x-2)
• D. (3x-7)(x-2)

Answer: Option B

Explanation:

• A. 12
• B. 10
• C. 6
• D. 5

Answer: Option A

Explanation:

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

Answer: Option A

Explanation:

• A. ১০
• B. ৩
• C. ১২

Answer: Option B

Explanation: