Question

Teorama de Pitágoras 20²=4x²+3x²

Answer 1

${20 }^{2} = {4x}^{2} + {3x}^{2}$
${4x}^{2} + {3x}^{2} = {20}^{2}$
$16 + 9 = {20}^{2}$
${20 }^{2} + 25 = {x}^{2}$
$400 + 25$
${x}^{2} = \sqrt{425}$
$x = 20$