Special Products Rule 3

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Expand $(4p + q)(4p - q)$

**Answer**

$\;\;\;(4p + q)(4p - q)$

$=(A + B)( A - B) \text{ , where } A = 4p \text{ and } B = q $

$=A^2-B^2$

$=(4p)^2 - (q)^2 $

$=16p^{2} - q^{2} $