Question

How do you find the LCM of `5ab, 10b`?

Answer 1

`LCM = 10ab`

Explanation:

The LCM is an expression which is divisible by both `5ab and 10b`

Look at the prime factors:

`5ab = color(white)(xxxxx)5 xx a xx b`
`10b = " "2xx5 color(white)(xxx)xxb`

`LCM = 2xx5xxaxxb = 10ab`

The LCM must have each type of factor but without the duplicates.