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OpenStudy (anonymous):
what is the greatest common factor of the polynomial below? 7x-21^2
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geerky42 (geerky42):
Well, 21 = 7*3
geerky42 (geerky42):
So \(7x - 21^2 = 7x-3^2\cdot 7^2\) Now can you tell me what is GCF here?
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