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Find the GCF of

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-42x^3y^3,21x^4y,84x^4y^4?

asked Sep 11, 2014 in ALGEBRA 1 by anonymous

1 Answer

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The monomials are - 42x3y3, 21x3y and 84x4y4.

Completely factor each expression.

- 42x3y3 = - 2 · 3 · 7 · x · x · x · y · y · y

21x3y = 3 · 7 · x · x · x · y

84x4y4 = 2 · 2 · 3 · 7 · x · x · x · y · y · y · y

 The GCF is the product of the common prime factors.

The GCF of - 42x3y3, 21x3y and 84x4y4 is 3 · 7 · x · x · x · y or 21x3y.

answered Sep 11, 2014 by casacop Expert

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