This document defines and explains what makes a quadratic equation by comparing it to linear equations. It states that a quadratic equation contains a term with an x squared (x2) which makes it two-dimensional, unlike a linear equation with just x which is one-dimensional. The document uses the example equation x2 + 3x + 2 to illustrate that it contains an x squared term, making it quadratic rather than linear.

1. Quadratic : what does it mean ? Presented by Rachel Cywinski July 2008

2. X 2 + 3x + 2 Why is this “ quadratic ”? 06/04/09 quadratic

3. Meet “x”. “ X” is a line. “ X” is one-dimensional. Here is “X”: _____ 06/04/09 linear

4. Meet “ X 2 ”. “ X 2 ” is a square. “ X 2 ” is two-dimensional. Here is “ X 2 ”: _____ ____ 06/04/09 quadratic

5. Quadrilaterals Quadrilateral Parallelogram Trapezoid Rectangle Rhombus Square Isosceles Trapezoid Source: www.cod.edu/people/faculty/hubbardd/presentations/Math%200470/Geometry-Chapter4-5.ppt

6. X 2 + 3x + 2 _____ _____ _____ 06/04/09 2D + 1D + points