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韦达定理反映了一元二次方程中根与系数间的关系,是初中代数中的一条重要定理.如能巧妙地运用此定理,可使解题过程简捷,收到事半功倍之效.
The Weida Theorem reflects the relationship between the root and the coefficient in the quadratic equation of one element, and is an important theorem in the junior high school algebra. If we can skillfully use this theorem, we can make the problem-solving process simple and efficient, and get twice the result with half the effort.