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40 votes
Write as a product x^2 + y^2 +2xy-1

User SnowyTracks
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1 Answer

10 votes
10 votes

Answer:

(x + y + 1)(x + y - 1)

Explanation:


{x}^(2) + {y}^(2) + 2xy - 1 \\ \\ = {(x + y)}^(2) - {(1)}^(2) \\ \\ = (x + y + 1)(x + y - 1)

User Marek Stanley
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