Respuesta :

hfrepgoireuipei

Answer:

a=1 c=3 b=3

Step-by-step explanation:

asmaNasr

Step-by-step explanation:

[tex] \frac{ {a}^{2} - bc}{b} = \frac{ {12}^{2} - 6 \times 3}{6} = \frac{144 - 18}{6} = \frac{126}{6} = 21[/tex]