Write the answer without negative or zero exponents: a-3

How to get rid of a negative exponent:

1.  Give the expression a coefficient of 1 if it doesn't 
    already have a coefficient
 
     1a-3

2. Write it over 1 if it's not already over something:

     1a-3
    ——————
      1
 
3.  Move the factor with the negative exponent from the 
    numerator to the denominator and change the sign of 
    the negative exponent to positive.

       1
    ——————
      1a3

4. Erase the 1 coefficient in the bottom

       1
    ——————
      a3

Edwin
AnlytcPhil@aol.com