This is the tenth book of Math Contest Books Series. The book introduces a powerful problem solving technique - Vieta's Theorem. The book can be used by students preparing for math competitions such as Mathcounts, AMC 10/12/AIME. Second book of Math Contest Books Series: https: //www.amazon.com/Balls-Boxes-Yongcheng-Chen/dp/1540390578 Third book of Math Contest Books Series: https: //www.amazon.com/dp/1540856410