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2014-08-01T12:41:17+03:00
4x² -4x +1 +9x² +12y +4=0

(2x-1)² +(3y+2)²=0

|2x-1| + |3y+2|=0

2x-1=0  ∧  3y+2=0
2x=1          3y= -2
x= 1/2          y= -2/3
2 5 2