What is the GCF of the following expression:

5y^5+35y^4+15y^3

5y^3

Step-by-step explanation:

Find what is common to all the terms

5y^5 = 5 * y*y*y*y*y

35y^4 = 5*7*y*y*y*y

15y^3 = 3*5*y*y*y

The all have 5*y*y*y

So the GCF is 5 y*y*y or 5y^3