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)
Related MCQs
- 2x² + 4 = 9x
- 2x² + 9 = 4x
- 2x² + 9 = 4x
- x² + 4 = 9x
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