![]() You can find the values for which this quadratic equation equals 0, so the equation has one or two answers. Solve the portion in parentheses with the quadratic formula if you can’t factor it manually. This article has been viewed 1,096,955 times. The term b 2 - 4ac is known as the discriminant of a quadratic equation. Solve Quadratic Equations Using the Quadratic Formula When we solved quadratic equations in the last section by completing the square, we took the same steps every time. For example, to solve x2 3 x + 1 0, you first say that a 1, b 3, and c. Note: the quadratic formula is not provided in the reference section of the SAT Youll have to memorize the formula to use it. For a x 2 + b x + c 0 : x b ± b 2 4 a c 2 a. ![]() Before you apply the formula, it’s a good idea to rewrite the equation in standard form (if it isn’t already) and figure out the a, b, and c values. The quadratic formula gives us a way to solve any quadratic equation as long as we can plug the correct values into the formula and evaluate. We discuss the graphing, factoring, quadratic formula. The standard form of a quadratic equation is: ax 2 + bx + c 0, where a, b and c are real numbers and a 0. The quadratic formula is the formula used to solve for the variable in a quadratic equation in standard form. This article has been fact-checked, ensuring the accuracy of any cited facts and confirming the authority of its sources. Learn 5 Methods for solving quadratic equations in this video math tutorial by Marios Math Tutoring. There are 10 references cited in this article, which can be found at the bottom of the page. Additionally, David has worked as an instructor for online videos for textbook companies such as Larson Texts, Big Ideas Learning, and Big Ideas Math. After attaining a perfect 800 math score and a 690 English score on the SAT, David was awarded the Dickinson Scholarship from the University of Miami, where he graduated with a Bachelor’s degree in Business Administration. With over 10 years of teaching experience, David works with students of all ages and grades in various subjects, as well as college admissions counseling and test preparation for the SAT, ACT, ISEE, and more. David Jia is an Academic Tutor and the Founder of LA Math Tutoring, a private tutoring company based in Los Angeles, California. ![]() This article was co-authored by David Jia and by wikiHow staff writer, Christopher M. ![]()
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