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  1. 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 …

  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 …

  3. 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 …

  4. Solving quadratic equations by factoring (article) - Khan Academy

    Learn how to solve quadratic equations like (x-1) (x+3)=0 and how to use factorization to solve other forms of equations.

  5. Worked example: quadratic formula (negative coefficients)

    The quadratic formula tells us that if we have a quadratic equation in the form ax squared plus bx plus c is equal to 0, so in standard form, then the roots of this are x are equal to negative b …

  6. Quadratic equations & functions | Algebra (all content) | Khan …

    This topic covers: - Solving quadratic equations - Graphing quadratic functions - Features of quadratic functions - Quadratic equations/functions word problems - Systems of quadratic …

  7. Solve quadratic equations with the quadratic formula (practice)

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

  8. 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.

  9. Quadratic equations | Algebra | Math | Khan Academy

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

  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.