Use the identity $(a + b) (a - b) = a^{2} - b^{2}$ to find the product of $(x + 6) (x - 6)$

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Solution

Using the identity $(a + b) (a - b)$ = $a^{2} - b^{2}$
Hence $(x + 6) (x - 6)$ = $x^{2} - 6^{2}$
The answer is $x^{2} - 36$

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