xy - y2 x2 + 2x + 1 , 2x2 + xy - 3y2 2x2 + 5xy + 3y2
Chapter 6, Problem 88(choose chapter or problem)
xy - y2 x2 + 2x + 1 , 2x2 + xy - 3y2 2x2 + 5xy + 3y2
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