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Greatest Common Factors - Problem 8 134 views

One way to find the greatest common factor of two monomials involves three steps: 1.) make a factor tree for both, breaking the integer into its prime factorization and writing out a list of the variables that are being multiplied, 2.)circle any "leaves" or bottom factors that are the same in both trees, and then 3.) multiply those circled leaves to find the GCF. This skill is particularly important when you go to add or subtract fractions that have variables and will need a common denominator.

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