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  1. 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 …

  2. 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 …

  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. 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 …

  5. 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 …

  6. Discriminant review (article) | Khan Academy

    The discriminant is the part of the quadratic formula underneath the square root symbol: b²-4ac. The discriminant tells us whether there are two solutions, one solution, or no solutions.

  7. Forms & features of quadratic functions (video) | Khan Academy

    To be quadratic, the highest power of any term must be 2 (the x is squared). If there is no equals sign, but it has a quadratic term, then it is a quadratic expression.

  8. Quadratic functions & equations: FAQ (article) | Khan Academy

    What is the quadratic formula? The quadratic formula is a formula we can use to solve any quadratic equation. It looks like this: x = b ± b 2 4 a c 2 a , where a , b , and c refer to the …

  9. Completing the square (video) | Khan Academy

    And what's neat about this is that this will work for any quadratic equation, and it's actually the basis for the quadratic formula. And in the next video or the video after that I'll prove the …

  10. 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.