问题
下面关于一元二次方程【$ax^{2} +$ $bx +$ $c = 0$】的韦达定理公式，正确的是哪个？选项
[A]. $x_{1} +$ $x_{2} =$ $- \frac{b}{a}$, $x_{1} \cdot$ $x_{2} =$ $\frac{c}{b}$[B]. $x_{1} +$ $x_{2} =$ $- \frac{b}{a}$, $x_{1} \cdot$ $x_{2} =$ $\frac{c}{a}$
[C]. $x_{1} +$ $x_{2} =$ $+ \frac{b}{a}$, $x_{1} \cdot$ $x_{2} =$ $\frac{c}{a}$
[D]. $x_{1} +$ $x_{2} =$ $- \frac{c}{a}$, $x_{1} \cdot$ $x_{2} =$ $\frac{b}{a}$
$x_{1} +$ $x_{2} =$ $- \frac{b}{a}$, $x_{1} \cdot$ $x_{2} =$ $\frac{c}{a}$