Question

What are the factors of x2 − 25?

(x − 5)(x − 5)
(x + 5)(x − 5)
(x − 1)(x + 25)
Prime

Answer 1

(x+5)(x-5)

Explanation:

took the test

Answer 2

)x + 5)(x - 5)

Explanation:

x² - 25 ← is a difference of squares and factors in general as

a² - b² = (a + b)(a - b), thus

x² - 25 = x² - 5² = (x + 5)(x - 5)