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 . 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:

4 . 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:

5 . x2-25

• A. 5
• B. 25
• C. -25
• D. -5

Answer: Option A

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 . 9x2-25y2

• A. 3x+5y
• B. 3x-5y
• C. $9x^2-25y^2$
• D. $5a\left(9x^2-25y^2\right)$

Answer: Option D

Explanation:

8 . x2-25=12

• A. -6
• B. -2
• C. 3
• D. 14

Answer: Option C

Explanation:

9 . x2-6x+5x2-25

• A. $\frac{x-5}{x+5}$
• B. $\frac{x+5}{x-5}$
• C. $\frac{x-5}{x-5}$
• D. $\frac{x+5}{x+5}$

Answer: Option A

Explanation: