Respuesta :

r3t40
[tex](x - 1)(x - 7) = 0 [/tex]

[tex] {x}^{2} - 8x + 7 = 0[/tex]

[tex] {x}^{2} - 8x = - 7[/tex]

[tex] - 7x = \frac{ - 7}{x} [/tex]

[tex]x = \frac{ - 7}{ \frac{x}{ - 7} } \implies x = x \implies x \in \mathbb{R}[/tex]

x is true for any number in real domain.

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