Parabolas and Quadratics

Completing the Square

by Henri Picciotto

Blog post: how to prepare students for this applet.

Download the Geogebra file,
the Cabri file,
or Gail Standiford's Geometer's Sketchpad version.
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Related pages on this site:
Squaring a Binomial
The Lab Gear
Geometry-Graphing Connection
Seeking Depth in Algebra 2
Applets Directory