Question

qual valor
desssa questao em anexo

Answer 1

$y=\frac{0,25-x^2}{0,5+x} \\ \\ y=\frac{0,25-(-2,1)^2}{0,5+(-2,1)} \\ \\ y=\frac{0,25-4,41}{-1,6} \\ \\ \boxed{y=\frac{-4,16}{-1,6}=2,6}$