Respuesta:
[tex]x = \sqrt{13} . \: x = - \sqrt{13} [/tex]
Explicación paso a paso:
[tex] {x}^{2} - 9 = 4[/tex]
[tex] {x}^{2} - 9 - 4 = 0[/tex]
[tex] {x}^{2} - 13 = 0[/tex]
[tex] {x}^{2} = 13[/tex]
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Respuesta:
[tex]x = \sqrt{13} . \: x = - \sqrt{13} [/tex]
Explicación paso a paso:
[tex] {x}^{2} - 9 = 4[/tex]
[tex] {x}^{2} - 9 - 4 = 0[/tex]
[tex] {x}^{2} - 13 = 0[/tex]
[tex] {x}^{2} = 13[/tex]