[tex]y + 7 {x}^{2} = 6[/tex]
(-1;-1)
[tex] - 1 + 7 \times ( { - 1}^{2} )= 6 \\ 6 = 6[/tex]
(1;-1)
[tex] - 1 + 7 \times {1}^{2} = 6 \\6 = 6[/tex]
(-2;-22)
[tex] - 22 + 7 \times ( - {2}^{2} ) = 6 \\ - 22 + 28 = 6 \\ 6 = 6[/tex]
(3;-57)
[tex] - 57 + 7 \times {3}^{2} = 6 \\ - 57 + 63 = 6 \\ 6 = 6[/tex]