In previous lessons, we saw how some methods had certain limitations because they cant be used in all situations. In this lesson, youll learn about the quadratic formula and the discriminant which can be used to solve any quadratic equation. To use the formula, our quadratic must be in standard form, with coefficients a, b, and c. The quadratic formula uses the discriminant, which can help us determine the number and the nature of the solutions. If the discriminant is positive or zero, the solutions are real; if the discriminant is negative, the solutions are complex. You'll learn more about these cases through the examples and get to test your new knowledge.
*These practice questions are only helpful when you work on them offline on a piece of paper and then use the solution steps function to check your answer.
Quadratic Formula and the Discriminant
Lecture Slides are screen-captured images of important points in the lecture. Students can download and print out these lecture slide images to do practice problems as well as take notes while watching the lecture.