← Algebra
How to solve
a² − b² = (a − b)(a + b).
Steps
- Recognize perfect squares.
- Write the two conjugate factors.
Example
x² − 9
- (x − 3)(x + 3).
Answer: (x-3)(x+3)
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← Algebra
a² − b² = (a − b)(a + b).
Steps
Example
x² − 9
Answer: (x-3)(x+3)