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Step-by-step explanation:
1 ) x = 2
[tex] = 2 {x}^{2} - 5[/tex]
[tex] = 2 \times (2 {)}^{2} - 5[/tex]
[tex] = 2 \times 4 - 5[/tex]
[tex] = 8 - 5[/tex]
[tex] = 3[/tex]
.....
2 ) x = 3
[tex] = 2 {x}^{2} - 5[/tex]
[tex] = 2 \times (3 {)}^{2} - 5[/tex]
[tex] = 2 \times 9 - 5[/tex]
[tex] = 18 - 5[/tex]
[tex] = 13[/tex]
.......