Understanding (x-6)(x+6)
This expression represents the product of two binomials: (x-6) and (x+6). It's a common example used to demonstrate the concept of the difference of squares.
The Difference of Squares Pattern
The difference of squares pattern states:
(a - b)(a + b) = a² - b²
In our case, 'a' is 'x' and 'b' is '6'.
Expanding the Expression
Let's expand (x-6)(x+6) using the distributive property (or FOIL method):
- First: x * x = x²
- Outer: x * 6 = 6x
- Inner: -6 * x = -6x
- Last: -6 * 6 = -36
Combining the terms, we get:
x² + 6x - 6x - 36
The middle terms (6x and -6x) cancel each other out, leaving us with:
x² - 36
Conclusion
Therefore, (x-6)(x+6) simplifies to x² - 36, demonstrating the difference of squares pattern.
This pattern is helpful for quickly factoring and expanding expressions and can be applied to various algebraic problems.