1 . a2-3a,a3-9aএবংa3-4a2+3a

• A. $a\left(a-3\right)$
• B. $a-3$
• C. $a$
• D. $a\left(a+3\right)$

Answer: Option A

Explanation:

2 . a2-3a,a3-9a

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

Answer: Option B

Explanation: