Question

quanto vale X ?

$\times ^{2} = 9$
por favor alguém pode me dar um exemplo
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Answer 1

${x}^{2} = 9 \\x = \sqrt{9} = 3 \\ {x}^{2} = 16 \\ x = \sqrt{16} = 4 \\ 4 \times 4 = 16$

Answer 2

$\LARGE\tt{} {x}^{2} = 9 \\ \LARGE\tt{}x = \pm \: 3 \\ \LARGE\tt{}x = - 3 \\\LARGE\tt{}x = 3 \\ \LARGE\tt{} x_{1} = - 3 \\ \LARGE\tt{} x_{2} = 3 \\ \\ {\large\boxed{\boxed{  { \LARGE \tt \LARGE\tt{} x_{1} = - 3 \\ }}}} \\ \LARGE\tt{}{\large\boxed{\boxed{ { \LARGE \tt x_{2} = 3}}}}$

${\large\boxed{\boxed{  { \large \tt Bons~Estudos! }}}}$