The top term of a fraction is the numerator.
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That's the greatest common factor, or GCF.
Common Apex
The answer is 3. Factor out each term to get: 39 = 3 x 13 87 = 3 x 29 The GCF is 3 since that term is common for these terms. In other words, 39 and 87 have the common factor of 3.
Find a number that evenly divides each term of the expression.
To factorize the expression abxb + acxc, we first identify the common factors in each term. In this case, the common factors are b in the first term and c in the second term. We then factor out these common factors to get b(a + x) + c(a + x). Finally, we factor out the common binomial factor of (a + x) to get (a + x)(b + c) as the fully factorized expression.