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  Babylonians solve quadratic equations with the completing square methods
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  Chinese scholars have been taking mathematical texts and putting them into the book, "The Nine Chapters of the Mathematical Arts"
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  Baudhayana, a mathematician from India Uses Algebra to derive Pythagorean’ theorem
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  Greek mathematician publishes Arithmetica (first ever arithmetic)
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  The oldest manuscript in Indian mathematicians with linear equations and symbols
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  Bhaskara creates variables by replacing values with letters and Brahmagupta solved the systems of equations
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  Wrote the first clearly explained book on how to solve algebraic equations. Considered the "Father of Algebra"
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  Wrote a book on how to solve quadratic and cubic equations
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  First to use the +/- signs to show positives and negatives
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  Proved the Fundamental Theorem of Algebra