To determine which expression would simplify to a positive exponent, let's evaluate each option:
A.
- So,
, which is not in exponent form.
B.
- This involves adding two negative exponents.
- We know that
and , so this is not a single positive exponent.
C.
- Using the property of exponents
: , which is still a negative exponent.
D.
- Using the property of exponents
: - This simplifies to
, which is also a negative exponent.
After evaluating all options, none of the choices provided simplify to a positive exponent. However, if "which expression" implies looking for something that doesn't directly imply a positive exponent but has the potential to reach positive results based on operations, D would be the best consideration since it revolves around manipulating exponents, but ultimately, all options present negative or non-exponential forms from calculations.