Find the greatest common factor (GCF/HCF) of the following polynomial:
Question:

Find the greatest common factor (GCF/HCF) of the following polynomial:
4a2b3, −12a3b, 18a4b3

Solution:

The numerical coefficients of the given monomials are 4, -12 and 18. The greatest common factor of 4, -12 and 18 is 2.

The common literals appearing in the three monomials are a and b. 

The smallest power of a in the three monomials is 2.

The smallest power of b in the three monomials is 1.

The monomial of the common literals with the smallest powers is a2b.

Hence, the greatest common factor is 2a2b​.

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