Expression 1: negative StartFraction, "x" squared Over 2 , EndFraction minus StartFraction, "y" squared Over 2 , EndFraction plus "x" "y" minus 4 "x" plus 4 "y" minus 1 equals 0−x22−y22+xy−4x+4y−1=0
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Label: left parenthesis, negative 2 , 2 , right parenthesis−2,2
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left parenthesis, negative 2 , 2 , right parenthesis−2,2