An x-intercept is the point where a parabola crosses the x-axis. This point is also known as a zero, root, or solution. Some quadratic functions cross the x-axis twice. Some quadratic functions never cross the x-axis. This tutorial focuses on the parabola that crosses the x-axis once -- the quadratic function with only 1 solution.
Four Different Methods for Finding the x-intercept of a Quadratic Function
- Graphing
- Factoring
- Completing the square
- Quadratic formula
This article focuses on the method that will help you find the x-intercept of any quadratic function - the quadratic formula.