Question

Use o teorema de pitagoras e encontre o valor de x

Answer 1

x² = 12² + 9²
x² = 144 + 81
x² = 225
x = √225
x = 15

Answer 2

$\large \boxed{ \begin{array}{l} x {}^{2} = 9 {}^{2} + 12 {}^{2} \\ x {}^{2} = 81 +144 \\ x {}^{2} \: = \: 225 \\ x = \sqrt{225} \\ x = 15 \\ \\ \\ \boxed{ \boxed{ \boxed{ \boxed{ \boxed{ \boxed{ \: \maltese \: \sf alternativa~(A) \: }}}}}}\end{array}}$