Respuesta :

Sub y=k-5x into xy=3
x(k-5x)=3
kx- 5kx =3
kx- 5kx-3 = 0
Discriminant > 0
(k-5k)^2 -4(0)(3) >0
(k-5k)^2 > 0
K^2 -10k +25k^2 > 0
26k^2 - 10k >0
13k^2 -5k >0
Discriminant<0
(-5k)^2 - 4(13k)(0)<0
25k^2<0
-5< k<5

I’m not really sure, but give it a try !

Otras preguntas