medium · GMAT Quant
A quadratic x^2 + kx + 49 (with k > 0) is a perfect square trinomial with exactly one root.
Which positive value of k makes it a perfect square with exactly one root?
- 98
- 7
- 14
- 24.5
- 49
Sign up free to see the explanation and track your rank →
More GMAT Quant practice
- Which of the following values is the largest?
- Which property of arithmetic justifies that first step?
- How many unique meal combinations can a customer create?
- What is the final price of the jacket?
- What is the actual distance between them?
- Which of the following must also be an even integer?
- What is the speed of the current?
- Including both endpoints, how many distinct integer price points are in this range?