Question

Factor completely 49x^2-25

Answer 1

(7x + 5)(7x - 5)

Explanation:

49x² - 25 ← is a difference of squares and factors in general as

a² - b² = (a + b)(a - b)

49x² = (7x)² ⇒ a = 7x

25 = 5² ⇒ b = 5

49x² - 25

= (7x)² - 5² = (7x + 5)(7x - 5)

Answer 2

(7x-5)(7x+5)

Explanation: