10х²-6xy+y²-4x+6>0(9x²-6xy+y²)+(x²-4x+4)+2>0(3x-y)²+(x-2)²+2>0
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10х²-6xy+y²-4x+6>0
(9x²-6xy+y²)+(x²-4x+4)+2>0
(3x-y)²+(x-2)²+2>0