Question

find the vertex of yesterday problem 2x^2-8x+11

Answer 1

$\bf \textit{vertex of a parabola}\\ \quad \\ \begin{array}{lcclll} 2x^2&-8x&+11\\ \uparrow &\uparrow &\uparrow \\ a&b&c \end{array} \qquad \left(-\cfrac{{{ b}}}{2{{ a}}}\quad ,\quad {{ c}}-\cfrac{{{ b}}^2}{4{{ a}}}\right)$