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$$ax^{2}+bx+c=a(x-x_{1})(x-x_{2})$$
x1=
x2=
\begin{align} x_{1}+x_{2}&=-\frac{b}{a}\\ \\ x_{1}\times x_{2}&=\frac{c}{a}\\ \end{align}
-b/a=
c/a=