Question 51085
Well, it looks like you haven't lost your touch.
Your initial step was quite correct. I am assuming that the task is to simplify the given expression.
{{{((x^2-64)/(5x))((10x^2)/(x+8))}}} You correctly factored the numerator of the first fraction.
{{{(((x+8)(x-8))/(5x))((10x^2)/(x+8))}}} and you also correctly cancelled the (x+8)'s
{{{((x-8)/(5x))((10x^2)/1)}}} At this point, you can cancel 5x's in the denominator and from the {{{10x^2}}} in the numerator.
{{{(8-x)(2x)}}} Finally, you can multiply these two factors.
{{{16x-2x^2}}}