# Which of the following must be true about b?

Anonymous

Question description

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?

• A. −8 ≤ b < −4

• B. b = −4

• C.−4 < b < 4

• D.b = 4

• E. 4 < b ≤ 8

I would need a comprehensive explanation on how you arrived at your answer so I'll know how to it the next time around. Thanks!

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