Answer
$a^{2}$ - 12ab + 36$b^{2}$
Work Step by Step
1. Square of a binomial
$(a - 6b)^{2}$ = $a^{2}$ + 2(a)(-6b) + $(-6b)^{2}$
2. Solve exponents and multiply
$a^{2}$ - 12ab + 36$b^{2}$
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