Respuesta:
Bien ahí vamos ♦
[tex] {t}^{2} - 20t - 21 = [/tex]
[tex](t - 21)(t + 1) = 0[/tex]
↓
[tex]x1 = 21[/tex]
[tex]x = - 1[/tex]
Saludos
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Respuesta:
Hola.
Bien ahí vamos ♦
[tex] {t}^{2} - 20t - 21 = [/tex]
[tex](t - 21)(t + 1) = 0[/tex]
↓
[tex]x1 = 21[/tex]
↓
[tex]x = - 1[/tex]
Saludos