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  Beauty & mystery in science.

A colorized view of Saturn in ultraviolet light [270-470 nm]. Credit: NASA and E. Karkoschka [University of Arizona].

  Science tidbit

ax2 + bx + c equals 0.
Quadratic Equation Roots

At some point during our math schooling, most of us were required to memorize the quadratic solutions equation. It was confusing, because we never knew what it was really about. Here's your chance to see where that messy equation comes from.

Solve the mystery of the quadratic equation solutions.

Delivery Addresses

We ship to most places, including AFO/APO addresses. The map shows some of the places that we have shipped to recently.

Where multiple shippers are available, the customer chooses the delivery service. Approximate shipping costs are shown prior to the completion of payment.