First of all, any number to the 0 power
is just one so replace the by .
which amounts to just erasing it:
Next we get rid of all negative exponents by this
pair of rules:
If any factor of the numerator has a negative exponent,
then move it from the numerator to the denominator and
change the sign of the exponent to positive:
If any factor of the denominator has a negative exponent,
then move it from the denominator to the numerator and
change the sign of the exponent to positive:
We move the from the numerator to the
denominator and write it with a positive exponent
in the denominator:
Next we move the from the denominator to the
numerator and write it with a positive exponent
in the numerator:
Finally we add the exponents of in the numerator
and we end up with:
Edwin
