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一元二次(以至高次)方程的根与系数的关系,是法国数学家韦达最先发现的,所以又称为韦迭定理。由于他第一次用符号代替已知量与未知量,确立了符号代数的原理和方法,从而使当时的代数学系统化;他在三角学上也有重要建树;他运用代数方法解决几何问题的思想为解析几何发展指明了方向;他对分析数学的重要见
The relationship between the root and the coefficient of the quadratic (or even higher) equation is first discovered by the French mathematician Veda and is also known as the Wei Di theorem. Since he replaced the known quantity with the unknown quantity for the first time, he established the principle and method of symbol algebra and systematized the algebra at that time; he also made important contributions to trigonometry; he used algebraic methods to solve geometric problems. The idea indicates the direction for the development of analytical geometry; his important insights into analytical mathematics