Summary of Introduction to the quadratic equation | Quadratic equations | Algebra I | Khan Academy

00:00:00 - 00:05:00

The quadratic equation is a second degree equation that is difficult to factor. However, by setting it equal to zero, you can solve for the zeroes. In this example, the quadratic equation is used to solve an equation in which the coefficient of the x term is -9, the coefficient of the x term is 10, and the constant is 1. The equation has two roots, which are 9 plus or minus 11 and negative 2 over negative 20.

• 00:00:00 The quadratic equation is a second degree equation that is difficult to factor. However, by setting it equal to zero, you can solve for the zeroes.
• 00:05:00 The quadratic equation is a tool for solving equations that involve quadratic terms. In this example, the quadratic equation is used to solve an equation in which the coefficient of the x term is -9, the coefficient of the x term is 10, and the constant is 1. The equation has two roots, which are 9 plus or minus 11 and negative 2 over negative 20.