Question

$x {}^{2} = 3 { }^{2} + 4 {}^{2}$

Answer 1

${x}^{2} = {3}^{2} + {4}^{2} \\ {x}^{2} = 9 + 16 \\ {x}^{2} = 25 \\ x = \sqrt{25} \\ x = 5$