Question

What are the factors of x2 - 25? (4 points)

a (x - 5)(x - 5)
b (x + 5)(x - 5)
c (x - 1)(x + 25)
d Prime

Answer 1

B

Explanation:

it's a dots equation.

Answer 2

Explanation:

a² - b² = (a + b)(a - b)

x² - 25 = x² - 5² {a =x; b = 5}

= (x + 5) (x -5)