Question

Gpt 

x^2-2xy+2y^2-2x+6y+13=0

Answer 1

\(x^2-2xy+2y^2-2x+6y+13=0\)

\(\Leftrightarrow\left(x-y\right)^2+y^2-2x+2y+6y+13=0\)

\(\Leftrightarrow\left(x-y\right)^2-2\left(x-y\right)+1+y^2+4y+4+8=0\)

\(\Leftrightarrow\left(x-y-1\right)^2+\left(y+2\right)^2+8=0\)

Answer 2

\(x^2-2xy+2y^2-2x+6y+13=0\)

\(\Leftrightarrow\)\(x^2-2x\left(y+1\right)+2y^2+6y+13=0\)

\(\Leftrightarrow\)\(x^2-2x\left(y+1\right)+\left(y+1\right)^2+y^2+4y+12=0\)

\(\Leftrightarrow\)\(\left(x-y-1\right)^2+\left(y+1\right)^2+\left(y+2\right)^2+8=0\)

Answer 3

xin lỗi mình làm giống Thành nhưng mình không coppy nha

Answer 4

3 thằng bn mình ))))