Question

The GCF of 18a and 20ab

Answer 1

2a
i need to have an answer at least 20 characters long so i'm writing this.

Answer 2

`2a`

Explanation:

We are asked to find GCF of
`18a` and
`20ab`.

We can see that GCF of
`a\text{ and }ab\text{ is }a`.

Let us find greatest common factor of 18 and 20.

Factors of 20: 1, 2, 4, 5, 10, 20

Factors of 18: 1, 2, 3, 6, 9, 18.

We can see that GCF of 20 and 18 is 2.

Upon combining GCF of numerical part and variable part we will get:
`2a`

Therefore, the greatest common factor of both expression is
`2a`.