Quadratic Formula Teacher Resources
Find Quadratic Formula educational ideas and activities
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Learning the Quadratic Formula from the Web
Students investigate the formula used to solve quadratic equations. In this algebra lesson, students solve quadratic equations using the quadratic formula and the discriminant to tell where the graph will intercept the x-axis. They set the equation to zero and solve for x.
Quadratic Formulas and Discriminant
Learners solve quadratic equations using the quadratic formula. In this algebra lesson, students identify the roots of a quadratic equation and the number of solutions using the discriminant.
The Quadratic Formula
In this quadratic formula worksheet, 9th graders identify and solve 20 different problems by applying the quadratic formula to each one. First, they read the lesson and examples to identify the quadratic formula. Then, students use the formula to solve each of the listed equations.
The Quadratic Formula
In this quadratic formula worksheet, learners use the quadratic formula to solve given problems. Examples and explanations are given at the beginning of the worksheet. This one-page worksheet contains 20 problems. Answers are provided at the end of the document.
In this algebra worksheet, students solve quadratic equations using factoring and the quadratic formula. There are 63 problems with an answer key.
What is the Quadratic Formula?
What do you do when you are trying to solve a quadratic equation and factoring and graphing aren't working out for you? Use the quadratic formula! Watch this video to find out exactly how to find your solutions with the quadratic formula. The tutorial offers explanation for each step as well as a demonstration of how to check your answers.
How was the Quadratic Formula Derived?
If you or your class members are interested in how the quadratic formula is derived, then take a look at this video! The tutorial takes you through each step necessary to derive the quadratic formula from the general form for a quadratic equation.
This is comprehensive lesson that considers many aspects of quadratic functions. It includes using factoring, completing the square and the use of the quadratic formula for finding the zeros of the function (including imaginary roots). It also reverses the whole process by looking at either different graphs of quadratic functions or zeros that are given and challenges the learner to derive the function. This lesson provides an excellent review for the second year algebra student or a multi-lesson unit for the more novice student.
Discriminant of Quadratic Equations
Defining the word "discriminant" in the context of the quadratic formula, Sal continues to guide viewers through the process of quadratic equations. The true value of this video, as in Sal's entire series, is the emphasis on truly understanding the mathematical process necessary to solve the problem. Sal wants to foster a deeper learning within young mathematicians, rather than just handing them a formula and telling them to use it.
New! An Integer Identity
Challenge algebra learners to use the difference of cubes to solve this problem. Once your charges have taken out the factor (a - b), combined the like terms and set them equal to zero, the problem becomes a factorable quadratic equation. Some pupils may use the quadratic formula to solve. Both solutions are illustrated in the resource.
Using the Quadratic Formula
It's the video your algebra class has been waiting for - Sal explains the quadratic formula! He describes it as "one of at least the top five most useful formulas In mathematics" and recommends that it be memorized, as long as one also remembers how to prove it. The rest of the video contains several clear and helpful applications of the formula in quadratic equations.
Proof of Quadratic Formula
Armed with their newfound (or refreshed) knowledge of the quadratic formula, viewers can now work with Sal to prove the formula - an important skill that is often ignored in algebra. Once they learn how to both use and prove the quadratic formula, mathematicians will have very little trouble correctly solving these equations.
Solving for Complex Zeros
Explore the connection between solutions to quadratic functions and their graphs. Use the quadratic formula to solve equations, sketch the graph, and classify the solutions as real or complex. Included are complete lesson plans and an activity handout with answers. Unfortunately, the graphic organizer handout cannot be accessed, but you can assess learners' understanding by having them create their own graphic organizers.
Students explore the use of the quadratic formula. After solving problems using factoring and completing the square, students then use the quadratic formula. They evaluate the discriminate, determine the nature of the roots and memorize the quadratic formula. After evaluating each method, students discuss hot to determine which method is easier to use.
The Quadratic Formula
Students solve quadratic function by completing the square. In this algebra lesson, students use the quadratic formula to factor quadratics and find the roots. They graph the parabola and identify its properties.
Introduction into Quadratic Formula
Students explore quadratic equations. Using dry erase boards, students graph solutions to quadratic equations and solve problems using the quadratic formula. They explore the quadratic formula and the use of the discriminant to predict the number of solutions. Links are provided to a quadratic calculator and animation of the derivation.
This worksheet is part of the TI-Nspire lesson on the quadratic formula. Pupils determine the solutions of a quadratic function by looking at a graph and the discriminant. They use the quadratic formula to solve quadratic functions on their Ti-Nspire.
Mathematicians determine the solutions of a quadratic function by looking at a graph. They use the quadratic formula to solve quadratic functions on their Ti-Nspire.
In this Algebra II worksheet, 11th graders use the discriminant to determine the nature of the roots of a quadratic equation, determine the best method to use when solving a quadratic, and practice using the quadratic formula to determine the roots of the equations. The four page worksheet contains nine worked examples and five practice problems. Solutions are not provided for the practice problems.
Unit Plan On Quadratic Equations
Students explore a variety of ways of solving quadratic equations. Students choose from graphing, factoring, finding square roots, completing the square and using the Quadratic formula. They ponder in the end on polynomial equations.