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How do you prove that a2 - 6a plus 9 is a perfect square?

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Anonymous

∙ 15y ago
Updated: 8/18/2019

a2 - 6a + 9 = a2 - 3a - 3a + 9 = a(a - 3) - 3(a - 3) = (a - 3)*(a - 3) = (a - 3)2

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∙ 15y ago
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