Answer:
9(4 + 5)
Step-by-step explanation:
The GCF of 36 and 45 is
36: 2 * 2 * 3 * 3
45: 3 * 3 * 5
The GCF of 45 and 36 is 9 (the bolded part)
9(4 + 5) would be how the distributive property would be written. The numbers inside the brackets represent what is not bolded.
