Thanks for your help! Could you help me with these questions as well?

1.

(a) Show that the graph y = x^2 - 3x + 11 is all above the x-axis for all values of x.

(b) Find the set of values of x for which the graph of y = 2x^2 + x - 10 is above the x-axis.

(c) Find algebraically the coordinates of the points of intersection of the graphs y = x^2 - 3x + 11 and y = 2x^2 + x - 10.

I tried looking in my textbook for help but I can't find any similar questions to these.