. 5 , , , .
. 5 , , , .
5 A1-A2] x + [ B1 -B2] y + [ C1 -C2] =0 ]
. 6x . 6y .
. 5 , . ( ) c1 ,c2 .
. , :ac de ec de .
: 1 (0 1 )
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