About 24,700 results
Open links in new tab
  1. Quadratic functions & equations | Algebra 1 | Math | Khan Academy

    We've seen linear and exponential functions, and now we're ready for quadratic functions. We'll explore how these functions and the parabolas they produce can be used to solve real-world problems.

  2. Quadratic formula explained (article) | Khan Academy

    Gain more insight into the quadratic formula and how it is used in quadratic equations. The quadratic formula helps you solve quadratic equations, and is probably one of the top five formulas in math.

  3. Quadratic formula review (article) | Khan Academy

    The quadratic formula allows us to solve any quadratic equation that's in the form ax^2 + bx + c = 0. This article reviews how to apply the formula.

  4. The quadratic formula | Algebra (video) | Khan Academy

    The quadratic formula helps us solve any quadratic equation. First, we bring the equation to the form ax²+bx+c=0, where a, b, and c are coefficients. Then, we plug these coefficients in the formula: (-b±√ …

  5. Solve quadratic equations with the quadratic formula (practice) | Khan ...

    Solve quadratic equations using the quadratic formula. For example, solve -9x+10x²+8=14.

  6. Using the quadratic formula | Algebra (video) | Khan Academy

    So, let's just apply the quadratic formula. The quadratic formula will tell us that the solutions-- the q's that satisfy this equation-- q will be equal to negative b. b is 2.

  7. Quadratic formula proof review (article) | Khan Academy

    If you've never seen this formula proven before, you might like to watch a video proof, but if you're just reviewing or prefer a text-based proof, here it is:

  8. Quadratic equations | Lesson (article) | Khan Academy

    Solving a quadratic equation means finding the value (s) for the variable (s) that make the equation true. To do that, we need to first understand how to work with squares and square roots.

  9. Quadratic equations | Algebra | Math | Khan Academy

    Learn how to solve quadratic equations, and how to analyze and graph quadratic functions.

  10. Solving quadratic equations | Lesson (article) | Khan Academy

    The formula is the easiest way to solve the quadratic equation. It works for all types of equations and can even be used to find out if the equation has a real solution or not.