Special Products Rule 3

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Expand $(8x + y)(8x - y)$

**Answer**

$\;\;\;(8x + y)(8x - y)$

$=(A + B)( A - B) \text{ , where } A = 8x \text{ and } B = y $

$=A^2-B^2$

$=(8x)^2 - (y)^2 $

$=64x^{2} - y^{2} $