Choose all of the equations that are true.

x2 + 2x - 24 = (x + 6) (x - 4)

x2 - 8x + 15 = (x + 5) (x + 3)

3x2 + 4x + 1 = (3x + 1) (x + 1)

5x2 - 2x - 3 = (5x + 3) (x - 1)

4x2 - 49 = (2x - 7) (2x + 7)

Step-by-step explanation:

These is True

x² + 2x - 24 = x² - 4x+6x - 24=x (x-4) + 6 (x-4) = (x + 6) (x - 4)

3x² + 4x + 1 = 3x² + 3x+x + 1 = 3x (x+1) + 1 (x+1) = (3x + 1) (x + 1)

5x² - 2x - 3 = 5x² - 5x+3x - 3 = 5x (x-1) + 3 (x-1) = (5x + 3) (x - 1)

4x² - 49 = 4x² - 7² = (2x-7) ² = (2x - 7) (2x + 7)

These is False

x² - 8x + 15 = x² - 5x-3x + 15 = x (x-5) - 3 (x-5) = (x-5) (x-3)

I think it's only D

Step-by-step explanation:

4x2-49 = (2x-7) (2x+7)

2x*2x=4x2

-7*7=-49, which makes the answer 4x2-49