Answer:
0
Step-by-step explanation:
f(5) = 5-5
f(5) = 0
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I need more info to answer this question
Answer: The greatest common factor, or GCF, is the greatest factor that divides two numbers. To find the GCF of two numbers: List the prime factors of each number. Multiply those factors both numbers have in common.
Step-by-step explanation: