Ngabéréskeun kuadrat nyaéta téhnik pikeun ngarobah polinomi kuadrat tina bentuk \begin{equation*} ax^2+bx+c \end{equation*} ka \begin{equation*} a(x-h)^2+k \end{equation*} dimana \begin{equation*} h = - \frac{b}{2a} \end{equation*} \begin{equation*} k = c - ah^2 = c - \frac{b^2}{4a} \end{equation*}
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