Resposta:

[tex] {a }^{2} = {b}^{2} + {c}^{2} [/tex]

[tex] {x}^{2} = {8}^{2} + {6}^{2} [/tex]

[tex] {x}^{2} = 64 + 36[/tex]

[tex] {x}^{2} = 100[/tex]

[tex]x \frac{100}{10} [/tex]

[tex]x = 10[/tex]