If the third power of - A, the second power of B and the m power of 4A, the n power of B are the same kind of terms, find the value of N-M

If the third power of - A, the second power of B and the m power of 4A, the n power of B are the same kind of terms, find the value of N-M

The third power of a, the second power of B and the m power of 4A, the n power of B are similar terms
be
m=3
n=2
n-m=2-3=-1