ˣ=
= = - 34 - 12
x=y=−34−12
{ = - 34 - 12 = - 34 - 12
{x=−34−12y=−34−12
{ = - 46 = - 46
{x=−46y=−46
( , ) = ( - 46 , - 46 )
(x,y)=(−46,−46)
- 46 = - 46 = - 34 - 12
−46=−46=−34−12
- 46 = - 46 =- 46
−46=−46=−46