Which of the following quadratic curves will not intersect with the x- axis?
-
A.
(y = 2 – 4x – x^{2}) -
B.
(y = x^{2} – 5x -1) -
C.
(y = 2x^{2} – x – 1) -
D.
(y = 3x^{2} – 2x + 4)
Correct Answer: Option D
Explanation
The criterion for the quadratic curve to intersect the x- axis is (b^{2} > 4ac).