Question

Factor completely. 9, x, squared, minus, 4 9x 2 −4

Answer 1

(3x - 2)(3x + 2)

Explanation:

given

9x² - 4 ← is a difference of squares and factors in general as

a² - b² = (a - b)(a + b)

then

9x² - 4

= (3x)² - 2² [ with a = 3x and b = 2 ]

= (3x - 2)(3x + 2) ← in factored form