The GCF of 15ab and 5b squared is 5b.
5b
The greatest common factor (GCF) of 15ab and 5b2 is 5b.
You need at least two terms to find a GCF.
28ab
(3a - 5b)(9a2 + 15ab + 25b2)
Do the coefficients first. Since 5 is a factor of 15, it is automatically the GCF. Choose the lowest power of the common variables. The GCF is 5b.
Do the coefficients first. Since 5 is a factor of 15, it is automatically the GCF. Choose the lowest power of the common variables. The GCF is 5a.
The GCF is 5b.
15ab
15ab
12ab+3ab=15ab