高手进,2道英文数学题的翻译
1.Use the quadratic formula to prove that the roots of such an equation must have -a/b as their sum and a/c as their product.
2.Prove that the sum of the squares of the roots of such an equation is a/b-2ac. （Hint）: Consider （r1+r2）. Derive an expression for r1+r2 from this.）