1 . 12a+b2+a-b2=

• 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:

2 . 1/2a+b2+a-b2=

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

Answer: Option A

Explanation:

3 . aa+b,aba+b2

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

Answer: Option A

Explanation:

4 . 12a+b2+a-b2=কত ?  

• 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:

5 . 12 a+b2+a-b2 

• 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:

6 . a+b2

• A. 80
• B. 70
• C. 90
• D. 60

Answer: Option A

Explanation:

7 . a+b2=?

• A. $a^2-2ab+b^2$
• B. (a+b)(a-b)
• C. ${(a-b)}^2+4ab$
• D. ${(a+b)}^2-4ab$

Answer: Option C

Explanation:

8 . a+b2

• A. $a^2+2ab+b^2$
• B. $a^2-2ab+b^2$
• C. $a^2+2ab-b^2$
• D. $a^2-2ab-b^2$

Answer: Option A

Explanation: