Differences of Squares with a GCF

36k² - 1

• (6k² + 1) (6k² - 1)

• Prime

• (6k + 1)(6k + 1)

• (6k + 1) (6k - 1)

2x² - 18

• 2 (x² - 9)

• 2 (x + 3) (x - 3)

• 2 (x² - 3)

• Prime

49x² - 25y²

• (7x + 5y)(7x - 5y)

• (7x +5y)(7x +5y)

• (7x² + 5y²)(7x² - 5y²)

• Prime

4n² - 49

• (2x + 7)(2x - 7)

• (4n + 7)(4n -7)

• Prime

• (2n + 7)(2n - 7)

Which of these can ONLY BE factored using difference of two squares?

• 144x² - 49y²

• x² + 4x - 12

• 100x² + 20x + 1

• 14x - 16

9x² - 49y⁶

• ( 3x + 7y³) (3x + 7y³) 

• ( 3x - 7y³) (3x + 7y³) 

• ( 3x - 7y³) (3x - 7y³) 

• Prime

• (5x-9)²

• (5x+9)(5x-9)

• 25(x-9)²

• (9x+5)(9x-5)

Fully Factor the Following
25x²-81

• (5x-9)²

• (5x+9)(5x-9)

• 25(x-9)²

• (9x+5)(9x-5)