Respuesta :

This one can be factored.

[tex]9x^2-81=9(x^2-9)[/tex]

Answer:

9(x - 3)(x + 3)

Step-by-step explanation:

Given

9x² - 81 ← factor out 9 from each term

= 9(x² - 9) ← x² - 9 is a difference of squares

= 9(x - 3)(x + 3) ← in factored form