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±√ …

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.

One of the common forms for quadratic functions is called vertex form, because it highlights the coordinates of the vertex of the function's graph.

Gain more insight into the quadratic formula and how it is used in quadratic equations.

Sal shows how to use the general form quadratic equation to write the equation of a parabola given any three points on it. Created by Sal Khan.

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 coefficients in a quadratic equation written in standard …

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

How to write an expression like ax^2 + bxy + cy^2 using matrices and vectors. Created by Grant Sanderson.

Learn how to graph any quadratic function that is given in standard form. Here, Sal graphs y=5x²-20x+15. Created by Sal Khan.

What's the difference between solving a quadratic equation set equal to zero by completing the square and rewriting a quadratic function from standard form to vertex form by completing the square?