1 . a+b=7

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

Answer: Option B

Explanation:

2 . a+b=7

• A. 12
• B. 24
• C. 36
• D. 40

Answer: Option B

Explanation:

3 . a-b=5

• A. $x^2+4x+3=0$
• B. $x^2-3x-4=0$
• C. $x^2+3x+5=0$
• D. $x^2+3x-4=0$

Answer: Option B

Explanation: