Question 68497
{{{(a^2-4ab)(a^2-ab-12b^2)/a^2(a+3b)}}}
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1. Factor 
{{{((a*(a-4b))((a-4b)(a+3b)))/a^2(a+3b)}}}
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2. Divide Common Factors
{{{((a-4b)(a-4b))/a}}}
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3. Simplify
{{{ (a-4b)^2/a}}} 
<br>or
<br> {{{(a^2-8b+16^2)/a}}}