Report copyright - fratstock.eu · Full file at 2.1 Exercises 102 79. 2x2 +2y2 −12x+20y +4 =0 x2 +y2 −6x +10y +2 =0 x2 −6x+y2 +10y =−2 x2 −6x+9+y2 +10y +25 =−2+9+25 ()( )x −3 + y
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