Can someone help please I believe you can put a pdf here

Step-by-step explanation:

The numbers in the box share something in common called AC method.

The two number that is missing must add to get the bottom number while must be a factor of the top number.

For example number 1

The factor of 12 are positive and negative 1,2,3,4,6,12

We can use positve 6 and 2 because 6+2=8

Another example is no.2 the factor of -9 are negative and positve 1,3,9. We can 3 and -3 since they multiply to -9 and add to 0.

3: 2

step-by-step explanation:

shorter piece is 2: 3, so just reverse it, and you get 3: 2