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For each variable, find the smallest exponent in all the expressions. If the variable does not appear in one of the expressions, it's exponent may be taken as 0. Also, remember that if a variable seems to be without an exponent, its exponent is actually 1 (that is x is the same as x1).

For example,

GCF(a3bc, a2c3, a3b2c3) = a2c.

Exponents of a are 3, 2 and 3: smallest = 2

Exponents of b are 1, 0 and 2: smallest = 0

Exponents of c are 1, 3 and 3: smallest = 1

The same rules apply for fractional exponents.

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Q: How do you find GCF with variables and exponents?
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