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The Quadratic Formula - One x-intercept

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The Quadratic Formula - One x-intercept
A parabola with one x-intercept

A parabola with one x-intercept

Jennifer Ledwith

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.

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