# Quadratic Formula Teacher Resources

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**1**-**20**of**294**resourcesThis exciting video takes all of the mystery out of the quadratic formula. By watching this video, learners gain an deeper understanding of the quadratic formula and the process of completing the square. Sal shows a step-by-step proof of how to get to the quadratic formula. Truly an amazing result!

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.

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.

In this quadratic formula learning exercise, 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.

In this quadratic formula worksheet, students 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.

Use the quadratic formula to solve a quadratic equation. Set the quadratic equation equal to zero. Identify the coefficient values and plug them in to the quadratic formula. Solve the equation. What? No solution. Really? Watch this video and check out how to identify that there is no real solution.

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.

Pupils solve quadratic function by completing the square. In this algebra lesson plan, students use the quadratic formula to factor quadratics and find the roots. They graph the parabola and identify its properties.

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.

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.

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.

I can never remember a formula. If you're like me, watch this video clip for a quick refresher on the quadratic formula. This could be a definite help at homework time, for homeschoolers, or prior to an exam.

In this online math worksheet, students practice their ability to solve equations which utilize the quadratic formula. Students can check their answers, and there are "hints" given should they get stuck.

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.

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.

Follow this planning guide to teach instruct your class on using the quadratic formula to solve parabolas and quadratic equations. A graphing calculator is required to solve the included practice problems.

This worksheet includes lots of explanation about the quadratic formula and factoring, including the advantages and disadvantages of each. Learners have the opportunity to try these method with a few equations using factoring, the quadratic formula, and graphs.

Introduce learners to the discriminant. The discriminant, used to find the number of real solutions to a quadratic equation, is part of the quadratic formula. The video shows where in the formula you can find it, and provides an example with a real quadratic equation. A decent resource.