Helpp :D (1 Viewer)

[hobozforlife]

For what values of k does k^2-kx+4=0 have no real roots?

 

[Trebla]

Find the discriminant. For no real roots, the discriminant must be negative. When you set the discriminant to be negative you then solve the inequality for k.

 

[hobozforlife]

Find the discriminant. For no real roots, the discriminant must be negative. When you set the discriminant to be negative you then solve the inequality for k.

Doesn't take a genius to get to that, but thanks for your effort.

 

[Trebla]

Oh looks like I didn't read it properly. Well assuming the variable is x then
x = (k^2 + 4)/k
in which case any non-zero value of k will allow x to be real. In the case of k = 0, x is undefined.