1) Find the range of values of k that give this equation no real roots.
a) (k + 1)x^2 + 4kx + 9 = 0
2) Show that x^2 + 2kx + 9 is >/ (more than or equal to) 0 for all real values of x, if k^2 /< (is less than or equal to) 9
Thank you very much - if you can show your workings to help me understand I'd be really grateful!