The two distinct pints means that the line y=2x+k needs to cross y=x^2-2-7 twice. This just tells you that the discriminant needs to be bigger than zero and doesn't tell you about how many values of k there is
The two distinct pints means that the line y=2x+k needs to cross y=x^2-2-7 twice. This just tells you that the discriminant needs to be bigger than zero and doesn't tell you about have many values of k there is