Question

${x}^{2} = - 64$
va rog

Answer 1

x² = - 64  Are solutii in multimea numereloe complexe  !
Adica: 
[tex] \sqrt{x^2} = \sqrt{-64} \,\longleftrightarrow\;\pm{x}=\pm{8i}\;unde\;i=\sqrt{-1}\\ [/tex]