The Quadratic Formula

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The Quadratic Formula In the 9th century A.D. Persian mathematician, Al-Khwarizmi developed the quadratic formula. The Quadratic Formula finds the x-intercepts of a parabola. This equation gives the tools to create curved glass surfaces. Though not much concrete biological evidence is known, we do have some information. Abu Ja’Far Muhammad Ibn Musa al-Khwarizmi is guessed to be born in Baghdad, Iraq, during the year 780 and died in 850. He has many different names, one is Qutrubbulli, another is al-Majusi, and also Gaurismo. His different names give Historians ideas of where he might have lived. They believe he lived in Uzbekistan, Baghdad, or in Persia. When al-Khwarizmi was older, he became a scholar in Mathematics and Astrology at The House of Wisdom. He was very dedicated to both subjects. He then made books on his work and discoveries. Some of the most important books he wrote are “The Compendious Book on Calculation by Completion and Balancing.” Another one is “al-Jabr.” In the books, he would write out everything, even the numbers, in Arabic. Because al-Khwarizmi made the first writing of Algebra in Arabic, he is known as the “Father of Algebra.” He not only focused on Mathematics and Astrology, but also Geography. In 830 he led a group of geographers to make the first map of the globe. His work led to a crater of the moon being named after him. Al-Khwarizmi made a contribution to Algebra, Arithmetic, Astronomy, Trigonometry, Geography, and Jewish calendar. One of his greatest discoveries is the Quadratic Formula. When solving for the roots, or x-intercepts, of a parabola you will have to use the Quadratic Formula. Sometimes you are able to factor, but factoring doesn’t work for all of the problems. On the other hand, the Quadratic Formula does. The Quadratic Formula is: The steps to solve the x-intercepts, using the

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