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?
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A. −8 ≤ b < −4
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B. b = −4
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C.−4 < b < 4
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D.b = 4
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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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