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The greatest common factor is 7a.
21ab+35a
=7a(3b+5)
GCF(21ab, 35a) = 7a. How? Factor out each term to get:
21ab = 3 x 7 x a x b
35a = 5 x 7 x a
The factors that occur both in 21ab and 35a are 7 and a. Therefore, the GCF is 7a.
Wiki User
∙ 8y ago
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∙ 12y agoThe greatest common factor (GCF) is 7a2b2.
Wiki User
∙ 8y agoThe GCF and LCM of 21 and 49 are 7 and 147 respectively
Wiki User
∙ 9y agoThe GCF is 1.
Wiki User
∙ 8y agoThe GCF is 7b.
Wiki User
∙ 7y agoThe GCF is 1.
Wiki User
∙ 7y agoThe GCF is 7.
Wiki User
∙ 11y ago7ab
Anonymous
21 and 49
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