PSAT Math Multiple-Choice Question 453: Answer and Explanation

Question: 453

Which of the quadratic functions shown has no zeros?

• A.
• B.
• C.
• D.

Correct Answer: D

Explanation:

D

Difficulty: Easy

Getting to the Answer: There are no zeros for choice (D) because the parabola never intersects or touches the x-axis. The discriminant of the quadratic formula for choice (D) will be negative because there are no real zeros.

There is a pair of zeros for choices (A) and (B). There is one zero for choice (C).