Respuesta :
To factor you have to make the tree so take each number and do it:
24
2x12
now you have to factor 12
2 x 6
now you have to factor 6
2 x3
now do 40
40
2x20
factor 20
2x10
factor 10
2x5
24
2x12
now you have to factor 12
2 x 6
now you have to factor 6
2 x3
now do 40
40
2x20
factor 20
2x10
factor 10
2x5