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The Book of Healing

The Book of Healing is a scientific encyclopedia written by the great Persian physician and philosopher Ibn Sina in the 11th century.

It covers logic, natural sciences, psychology, geometry, astronomy, arithmetic and music.



All Wikipedia text is available under the terms of the GNU Free Documentation License

 
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Quadratic formula

... means that the parabola described by the quadratic equation touches the x-axis in a single point.) If the discriminant is positive, then there are two differen ...

 
 
 
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