For this case, we have that by definition, the LCM of two or more natural numbers, is the smallest natural number that is a common multiple of all of them.
Then, the LCM of 8 and 5 is the smallest positive integer that divides both numbers without leaving residues.
Multiplos:
8: 8,16,24,32,40,48
5: 1,10,15,20,25,30,35,40,45
Thus, the LCM of 8 and 5 is 40.
Therefore the LCM of the given expressions is:
![40b ^ 2n ^ 3](https://img.qammunity.org/2020/formulas/mathematics/high-school/1mwhyih9u1vhv936mtye6ld32jeoijg8o0.png)
Answer:
![40b ^ 2n ^ 3](https://img.qammunity.org/2020/formulas/mathematics/high-school/1mwhyih9u1vhv936mtye6ld32jeoijg8o0.png)