Answer:
C
Step-by-step explanation:
Given
9x² - 1 ← is a difference of squares and factors in general as
a² - b² = (a - b)(a + b), thus
9x² - 1
= (3x)² - 1² = (3x - 1)(3x + 1) → C
Answer: C.) (3x – 1)(3x + 1)
Step-by-step explanation: a p e x :)
