来自田涛的问题
【高手进,2道英文数学题的翻译1.Usethequadraticformulatoprovethattherootsofsuchanequationmusthave-a/bastheirsumanda/castheirproduct.2.Provethatthesumofthesquaresoftherootsofsuchanequationisa/b-2ac.（Hin】
高手进,2道英文数学题的翻译
1.Usethequadraticformulatoprovethattherootsofsuchanequationmusthave-a/bastheirsumanda/castheirproduct.
2.Provethatthesumofthesquaresoftherootsofsuchanequationisa/b-2ac.（Hint）:Consider（r1+r2）.Deriveanexpressionforr1+r2fromthis.）
