Question 141431
{{{ ((5X^3)(16X^2))/(80X^3) }}}


First multiply 5 times  16 =80.  Secondly, when you  multiply with the same base number, you must ADD the exponents!
{{{ (80x^5)/(80X^3) }}}


Next, divide out the 80s, and when you divide, you must SUBTRACT the exponents!
{{{ x^2}}}


You probably need additional explanation! I have a complete explanation that is designed for folks who have trouble with math.  See my own website by clicking on my tutor name "rapaljer" anywhere in algebra.com.  Take the second link on my homepage, which is "Basic, Intermediate, and College Algebra: One Step at a Time."  Click on Basic Algebra, then click on Chapter 2, and look for Section 2.12 Positive Exponents.  At least I think it is Section 2.12.


See if this helps.


R^2