[tex]y = {x}^{2} + 2x[/tex]

[tex]x = 0.5 \\ y = (0.5) {}^{2} + 2 \times 0.5 = \\ 0.25 + 1 = 1.25[/tex]

[tex]x = - 6 \\ y = ( - 6) {}^{2} + 2 \times ( - 6) = \\ 36 - 12 = 24[/tex]

[tex]x = 3 \\ y = {3}^{2} + 2 \times 3 = 9 + 6 = 15[/tex]

[tex]x = - 3.1 \\ y = ( - 3.1) {}^{2} + 2 \times ( - 3.1) = \\ 9.61 - 6.2 = 3.41[/tex]

[tex]x = 5 \\ y = {5}^{2} + 2 \times 5 = 25 + 10 = 35[/tex]

[tex]x = - 0.2 \\ y = ( - 0.2) {}^{2} + 2 \times ( - 0.2) = \\ 0.04 - 0.4 = - 0.36[/tex]