Question 1132682
 In the xy-plane, the graph of the function 
f(x)=x^2+bx+4
does not intersect the x-axis. Which of the following must be true about b?
:
Using the rules of the discriminant b^2 - 4ac < than 0, no real solutions
therefore
b^2 < (4*1*4)
b^2 < 16,
-4 > b < +4  will not intersect the x axis