Question 1005817
<pre>
{{{a^3}}}{{{"">""}}}{{{b^3}}}

{{{a^3-b^3}}}{{{"">""}}}{{{0}}}

{{{(a-b)(a^2+ab+b^2)}}}{{{"">""}}}{{{0}}}

The products and sums of positive 
number are positive, therefore

Since a > b then a-b > 0

Since a > 0 and b > 0 then a<sup>2</sup> > 0, b<sup>2</sup> > 0, and ab > 0.

{{{(a-b)(a^2+ab+b^2)}}} is positive or

{{{(a-b)(a^2+ab+b^2)}}}{{{"">""}}}{{{0}}}

Edwin</pre>