1 . a+b=7 এবং a2+b2=25

• A. 12
• B. 10
• C. 6
• D. None of them

Answer: Option A

Explanation:

2 . a-b=7,ab=60

• A. 180
• B. 168
• C. 169
• D. 170

Answer: Option C

Explanation:

3 . a2-b2=8

• A. $\pm 10$
• B. $10$
• C. $\pm 11$
• D. $11$

Answer: Option A

Explanation:

4 . a+b=7

• A. $12$
• B. $24$
• C. $36$
• D. $40$

Answer: Option B

Explanation:

5 . 2a2+b2=

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

Answer: Option C

Explanation:

6 . a2+b2=45

• A. 21
• B. 18
• C. 13
• D. 24

Answer: Option B

Explanation:

7 . a+b=7

• A. 12
• B. 24
• C. 36
• D. 40

Answer: Option B

Explanation:

8 . a2+b2=25

• A. 12
• B. 60
• C. 35
• D. কোনটিই না

Answer: Option B

Explanation:

9 . a2+b2=45

• A. $\frac{1}{3}$
• B. $\frac{1}{2}$
• C. $\frac{3}{4}$
• D. $\frac{2}{3}$

Answer: Option B

Explanation:

10 . a+b=5

• A. $4$
• B. $4\sqrt{2}$
• C. $6$
• D. $\sqrt{8}$

Answer: Option A

Explanation:

11 . a2+b2=25

• A. ৬
• B. ৭
• C. ৮
• D. ৯

Answer: Option B

Explanation:

12 . a2+b2=25

• A. 12
• B. 10
• C. 6
• D. 5

Answer: Option A

Explanation:

13 . if a2+b2=45

• A. $\frac{1}{3}$
• B. $\frac{1}{2}$
• C. $\frac{2}{3}$
• D. $\frac{1}{4}$

Answer: Option B

Explanation:

14 . a2+b2=?

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

Answer: Option B

Explanation:

15 . a2+b2=5ab,

• A. 16
• B. 23
• C. -16
• D. -23

Answer: Option B

Explanation: