This is a pretty easy question once you know how to start. You just have to use the discriminant, which is the b^2 - 4ac part of the quadratic equation. If the quadratic equation has at least one root, the discriminant must be greater than or equal to zero. Using this fact, you can make an inequality and find the greatest possible value of k.
Look here for more information about the discriminant: https://studywell.com/maths/pure-maths/algebra-functions/discriminants/
Hey @Apaul466,
This is a pretty easy question once you know how to start. You just have to use the discriminant, which is the b^2 - 4ac part of the quadratic equation. If the quadratic equation has at least one root, the discriminant must be greater than or equal to zero. Using this fact, you can make an inequality and find the greatest possible value of k.
Look here for more information about the discriminant: https://studywell.com/maths/pure-maths/algebra-functions/discriminants/