Question

qual o valor da equação do 2 emcompleta×2-25=0​

Answer 1

→ Cálculo :

$\sf { \ {\boxed { \begin{array}{lr} { \sf x {}^{2} - 25 = 0} \\ \\ { \sf x {}^{2} = 0 + 25}\\\\{ \sf x {}^{2} = 25 } \\ \\ { \sf x = \pm \ \sqrt{25} } \\ \\ { \sf x = \pm \: 5}\\\\\boxed{\red{ \ \sf S = \left \{ 5,- 5 \right \} }} \sf \ { \Leftrightarrow} \ Resposta \\ \end{array}}}}$