In such cases, typicall different variables appear raised to different powers. You choose the smallest of such powers. If a variable only appears in one of the two expressions, you don't include it at all.
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You don't; you need at least two numbers to find a GCF.
The GCF is 1.
You need at least two numbers to find a GCF.
The product of the GCF and the LCM of two numbers is equal to the product of the original two numbers. Multiply the GCF and the LCM. The original two numbers will be another factor pair of that total. Find the factor pair that has that GCF and LCM.
Two or more numbers are normally needed to find the GCF