To find the greatest common factor (GCF) of 8a and 28, we need to find the largest number that divides both terms evenly.
The factors of 8a are 1, 2, 4, 8, a, 2a, 4a, and 8a.
The factors of 28 are 1, 2, 4, 7, 14, and 28.
The common factors of 8a and 28 are 1, 2, and 4.
The largest common factor (GCF) is 4.
To factor 8a - 28 using the GCF of 4, we can divide both terms by 4:
(8a - 28) / 4 = 2a - 7
Therefore, 8a - 28 factors as 4(2a - 7).
Factor 8a − 28 using the GCF
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