# math 213

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Kahlil said that using the equation
he can find a similar equation for
Examine his argument. If it is correct, supply any missing
steps or justifications; if it is incorrect, point out why.
= a2 - 2ab + b2
= a2 + 2a1-b2 + 1-b22
1a - b22 = 3a + 1-b242
2ab + b2, 1a - b22.
1a + b22 = a2 +

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