Which of the following must be true about b?

Which of the following must be true about b?

In the xy-plane, the graph of the function f(x) = x2 + bx + 4 does not intersect the x-axis. Which of the following must be true about b?

  • −8 ≤ b< −4
  • b = −4
  • −4 < b< 4
  • b= 4
  • 4 < b ≤ 8

 

Last Updated on February 11, 2019 by Essay Pro