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
Explanation
The expression x³ + 27 can be factored using the sum of cubes formula:
x³ + 27 = x³ + 3³
= (x + 3)(x² - 3x + 9)
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