Question

Determine o valor de x

Answer 1

${26}^{2} = {x}^{2} + {13}^{2} \\ 676 = {x}^{2} + 169 \\ 676 - 169 = {x}^{2} \\ 507 = {x}^{2} \\ \sqrt{507} = x \\ 13 \sqrt{3} = x$

Answer 2

Pitágoras.

26² = 13² + x²

x² = 26² - 13²

x² = 4*13² - 13² = 3*13²

x = 13√3