Factoring is very helpful in simplifying expressions and solving equations involving polynomials. The greatest common factor (GCF) of two numbers is the largest number that divides evenly

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The greatest common factor (GCF or GCD or HCF) of a set of whole numbers is the largest positive integer that divides evenly into all numbers with zero remainder. For example, for the set of numbers 18, 30 and 42 the GCF = 6.

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So all the common factors are 1, 2 and 4. And what's the greatest of them? Well, that's pretty easy. It's 4. So the greatest common factor of 12 and 8 is 4. Let me write that down just for

Greatest Common Factor (GCF) Calculator

Interactive math video lesson on Greatest common factor: The biggest factor that numbers have in common - and more on algebra. The future of online learning. About. Blog. Log in. Algebra › Greatest common factor.

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