1) common factors of the variable is x
2) common factors of the constants is 4
3) common factors of the expression is 4x
<em><u>Solution:</u></em>
Given that,

<em><u>1. Explain how you find the common factors of the variable?
</u></em>
The variables are:

Find the factors:

Here, "x" is present in all variables
x is the greatest common factor
Thus common factors of the variable is x
<em><u>2, Explain how you find the common factors of the constants?</u></em>
The constants are 12, 20 and 32
Find the greatest common factor
List down factors of 12, 20 and 32
The factors of 12 are: 1, 2, 3, 4, 6, 12
The factors of 20 are: 1, 2, 4, 5, 10, 20
The factors of 32 are: 1, 2, 4, 8, 16, 32
Then the greatest common factor is 4
The common factors of the constants is 4
<em><u>3. What are the common factors of the expression?</u></em>
Given is:

Factor out x and 4

The common factors of the expression is 4x