OML Search

Using the Quadratic Formula


Videos to help Algebra I students learn how to use the quadratic formula to solve quadratic equations that cannot be easily factored.
Students understand that the discriminant, b2 - 4ac, , can be used to determine whether a quadratic equation has one, two, or no real solutions.

New York State Common Core Math Module 4, Algebra I, Lesson 15

Related Topics:
Lesson Plans and Worksheets for Algebra I

Lesson Plans and Worksheets for all Grades

More Lessons for Algebra I

Common Core For Algebra I

Lesson 15 Summary

You can use the sign of the discriminant, b2 - 4ac, to determine the number of real solutions to a quadratic equation in the form ax2 + bx + c = 0, where a ≠ 0. , where . If the equation has a positive discriminant, there are two real solutions. A negative discriminant yields no real solutions and a discriminant equal to zero yields only one real solution.

Rotate to landscape screen format on a mobile phone or small tablet to use the Mathway widget, a free math problem solver that answers your questions with step-by-step explanations.

You can use the free Mathway calculator and problem solver below to practice Algebra or other math topics. Try the given examples, or type in your own problem and check your answer with the step-by-step explanations.

OML Search

We welcome your feedback, comments and questions about this site or page. Please submit your feedback or enquiries via our Feedback page.

[?] Subscribe To This Site

follow us in feedly
Add to My Yahoo!
Add to My MSN
Subscribe with Bloglines