Respuesta:
c
Explicación paso a paso:
[tex] {x}^{2} - 81 = 0[/tex]
[tex](x + 9)(x - 9) = 0[/tex]
[tex]x1 = 9 \: \: \: \: \: x2 = - 9[/tex]
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Respuesta:
c
Explicación paso a paso:
[tex] {x}^{2} - 81 = 0[/tex]
[tex](x + 9)(x - 9) = 0[/tex]
[tex]x1 = 9 \: \: \: \: \: x2 = - 9[/tex]