Resposta :
Resposta:
[tex]\textsf{Leia abaixo}[/tex]
Explicação passo-a-passo:
[tex]\mathsf{y - x = A_{8,3} - C_{8,3}}[/tex]
[tex]\mathsf{y - x = \dfrac{8!}{(8-3)!} - \dfrac{8!}{3!.(8 - 3)!}}[/tex]
[tex]\mathsf{y - x = \dfrac{8.7.6.\not5!}{\not5!} - \dfrac{8.7.6.\not5!}{3!.\not5!}}[/tex]
[tex]\mathsf{y - x = 336 - \dfrac{336}{6}}[/tex]
[tex]\mathsf{y - x = 336 - 56}[/tex]
[tex]\boxed{\boxed{\mathsf{y - x = \boxed{\boxed{280}}}}}[/tex]