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Which section of the ninth grade math quality class is good to talk about?
Vieta theorem and its application.

Vieta theorem is the relationship between roots and coefficients in a quadratic equation with one variable, and it is widely used. Later, in other unary quadratic equations, the relationship between roots and coefficients was also discussed. Therefore, in terms of content, this content has a high position in mathematics and students are also very interested. His content is novel, his relationship is unique, and it is easy to have high-quality classes.