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O número (-9) é considerado **racional** porque ele pode ser expresso como o quociente de dois números inteiros, com o denominador diferente de zero.

Por exemplo:

[

-9 = \frac{-9}{1} \quad \text{ou} \quad -9 = \frac{-18}{2}.

]

A definição de um número racional é qualquer número que pode ser escrito na forma de uma fração ( \frac{a}{b} ), onde:

  • (a) e (b) são inteiros;

  • (b \neq 0).

Como (-9) atende a esses critérios, ele é um número racional.

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Ana Larissa

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3mo ago

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Wiki User

7y ago

Because it is an integer and all integers and fractions are rational numbers

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Q: Why is negative 9 a rational number?
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Is negative 9 a rational or irrational?

-9 is a rational number


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