Factor x² - 9
Step-by-step solution with detailed explanations
Final Answer
(x+3)(x-3)
Step-by-Step Solution
1
Recognize
Difference of squares: a² - b²
2
Apply formula
a² - b² = (a+b)(a-b)
3
Result
(x+3)(x-3)
Expert Insights
Pattern: x² - 9 = x² - 3²
Formula: Difference of squares always factors
Pro Tip: Look for difference of squares: a² - b² = (a+b)(a-b)