(3х-2)(3х+2)(9х²+4)

To multiply the given expressions, you can use the distributive property.

First, let's multiply the first two expressions:
(3x - 2)(3x + 2)
= 3x * 3x + 3x * 2 - 2 * 3x - 2 * 2
= 9x² + 6x - 6x - 4
= 9x² - 4

Now, multiply the result by the third expression:
(9x² - 4)(9x² + 4)
= 9x² * 9x² + 9x² * 4 - 4 * 9x² - 4 * 4
= 81x^4 + 36x² - 36x² - 16
= 81x^4 - 16

Therefore, the final result of the expression (3x - 2)(3x + 2)(9x² + 4) is 81x^4 - 16.