Respuesta:
x² + x = 90
x(x + 1) = 90
x = 9
El número es 9
Explicación paso a paso:
[tex] {x}^{2} + x = 90[/tex]
[tex] {9}^{2} + 9 = 90 \\ 81 + 9 = 90[/tex]
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Verified answer
Respuesta:
x² + x = 90
x(x + 1) = 90
x = 9
Respuesta:
El número es 9
Explicación paso a paso:
[tex] {x}^{2} + x = 90[/tex]
[tex] {9}^{2} + 9 = 90 \\ 81 + 9 = 90[/tex]