Question 312843
{{{(n^2-16)/(n+4)}}}{{{"·"}}}{{{(n+2)/(n^2-8n+16)}}}
<pre><b>
Factor the numerator of the left fraction and the denominator of the
right fraction:

{{{(

(n-4)(n+4)


)/(n+4)}}}{{{"·"}}}{{{(n+2)/(


(n-4)(n-4)

)}}}

Cancel the {{{(n+4)}}} in the numerator on the left into
the {{{(n+4)}}} in the denominator of the left fraction:

{{{((n-4)(cross(n+4)))/(cross(n+4))}}}{{{"·"}}}{{{(n+2)/((n-4)(n-4))}}}

Cancel the {{{(n-4)}}} in the numerator on the left into
the {{{(n-4)}}} in the denominator of the right fraction:

{{{((cross(n-4))(cross(n+4)))/(cross(n+4))}}}{{{"·"}}}{{{(n+2)/((n-4)(cross(n-4)))}}}

All that's left is

{{{(n+2)/(n-4)}}}

Edwin</pre>