Answer:

Step-by-step explanation:
Physic Units
Physic magnitudes are expressed in international units in different systems. The most used by this modern times is the SI (International System of Units) which expressed length in meters, time in seconds and mass in kg, just to mention some of the most-used magnitudes.
The given expression is a composition of basic units:

Converting negative in positive powers:

Expanding the square

Simplifying by m and multiplying like factors
