1 . 16x2-25y2

• A. $6ax-10ay$
• B. $4x+5y$
• C. $4ax-5ay$
• D. $4x-5y$

Answer: Option D

Explanation:

2 . x-5a+x=x2-25

• A. -5
• B. 5
• C. 25
• D. -25

Answer: Option B

Explanation:

3 . x-5a+x=x2-25

• A. 5
• B. 25
• C. -25
• D. -5

Answer: Option A

Explanation:

4 . x2+5x,x2-25x,x2+7x+10

• A. $x-5$
• B. $x+5$
• C. $x\left(x+5\right)$
• D. $x\left(x+5\right)\left(x-5\right)\left(x+2\right)$

Answer: Option B

Explanation:

5 . x-5a+x=x2-25

• A. 25
• B. -25
• C. 5
• D. -5

Answer: Option C

Explanation:

6 . x2+5x,x2-25,x2+7x+10

• A. x-5
• B. x+5
• C. x(x+5)
• D. x(x-5)

Answer: Option B

Explanation:

7 . x2-25

• A. 5
• B. 25
• C. -25
• D. -5

Answer: Option A

Explanation: