Both x^2 and 9 are perfect squares. Since subtraction is occurring between these squares, this expression is the difference of two squares. This is where the term : Difference comes from.
| What times itself will give x^2 ? The answer is x. What times itself will give 9 ? The answer is 3. In order words the square root of 9 is 3 . |
The factors are (x + 3) and (x - 3).
Answer: (x + 3) (x - 3) or (x - 3) (x + 3) Order doesn't matter.
Answer: (x + 3) (x - 3) or (x - 3) (x + 3) Order doesn't matter.
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