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Mathematics 20 Online
mikethel:

Tasha incorrectly found the greatest common factor (GCF) of 21xy2z2 and 35x2yz2 to be 5xyz2. Which statement explains her mistake?

Vocaloid:

She correctly identified the GCF for the variables, but 5 is not the GCF of 21 and 35. 5 is not a factor of 21. To find the GCF of 21 and 35, list factors for each and find the largest factor present in *both* lists of factors.

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