The expression x³ + 27 is equivalent to _____?

(x - 3)(x² − 3x + 9)

(x + 3)(x² − 3x − 9)

(x + 3)(x² − 3x + 9)

None of these

The expression x³ + 27 can be factored using the sum of cubes formula:

x³ + 27 = x³ + 3³

= (x + 3)(x² - 3x + 9)