LiveMath Example
Once again, we go straight to the final answer.
You can change any of the numbers in either matrix and observe the changes.
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The locus and the ellipse

A reader from Chile provides an explanation of the locus of the center of an ellipse which moves such that it is tangent to the positive x- and y-axes....
Review of Top Math Sites
Here's a review of some "top math sites" as chosen by Homeschool.com.
Some of them don't really pass muster....
Friday Math Movie - The Quadratic Formula Video

This week's movie uses music to help you remember the quadratic formula....
Once again, we go straight to the final answer.
You can change any of the numbers in either matrix and observe the changes.
[You need LiveMath Viewer to see this file. Go to Download LiveMath for information.]