Answer:
(4x - 5)(4x + 5)
Step-by-step explanation:
given
16x² - 25 ← this is a difference of squares and factors in general as
• a² - b² = (a - b)(a + b)
then
16x² - 25
= (4x)² - 5² ← with a = 4x and b = 5
= (4x - 5)(4x + 5) ← in factored form
