정답
Sum of the roots: $r_1 + r_2 = -\frac{b}{a}$. Product of the roots: $r_1 \cdot r_2 = \frac{c}{a}$.
해설
Vieta's formulas bypass factoring or the quadratic formula when the question asks for the sum or product of solutions, saving significant time.
홈 / 라이브러리 / Digital SAT Math: Algebra, Advanced Math & Geometry / AI 플래시카드
What are Vieta's formulas for the sum and product of the roots of a quadratic equation $ax^2 + bx + c = 0$?
덱 'Digital SAT Math: Algebra, Advanced Math & Geometry'의 플래시카드.