Which of the following quadratic curves will not intersec...
Which of the following quadratic curves will not intersect with the x- axis?
y=2−4x−x2
y=x2−5x−1
y=2x2−x−1
y=3x2−2x+4
Correct answer is D
The criterion for the quadratic curve to intersect the x- axis is b2>4ac.
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