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Mathematics, 29.06.2019 07:10 sophiaa23

In order for kevin to prove the polynomial identity (a + b)2 = a2 + 2ab + b2, what is the first step that kevin needs to use to rewrite (a + b)2?

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In order for kevin to prove the polynomial identity (a + b)2 = a2 + 2ab + b2, what is the first step...
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