Special Products Rule 2

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Expand $(6k - l)^2$

**Answer**

$\;\;\;(6k - l)^2$

$=(A - B)^2 \text{, where } A = 6k \text{ and } B = l $

$=A^2 - 2AB + B^2$

$=(6k)^2 - 2(6k)(l) + (l)^2 $

$=36k^{2} - 12kl +l^{2} $