What should be added to x2+ 2xy + 5y2to obtain 2x2+ 7xy?Need the process too please
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2x² + 7xy - (x² + 2xy + 5y²)
= 2x² + 7xy - x² - 2xy - 5y²
= (2 - 1)x² + (7 - 2)xy - 5y²
= x² + 5xy - 5y²
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