
Answer:
Dimension symbols are the units of symbols
I am considering the dimension symbols the same as their units so don't be confused.
As you know the distance is measured in m so the dimension
would be M
Velocity = displacement/time = M / T
time = T
number and powers do not have dimensions
acceleration = velcotiy / time = M/TxT
so put this in the equation now to get the answer
or prove it
M = M/T x T +1/2 x M/T^2 x T^2
1/2 is canceled as its dimension are 0
so you left with
M= M/T x T
M= M hence proved