Question

Mind if I have help once more?

Answer 1

$\bf -2=-x+x^2-4\\\\ \begin{array}{llccll} 0=&1x^2&-1x&-2\\ &\uparrow &\uparrow &\uparrow \\ &a&b&c \end{array} \qquad \qquad \begin{array}{llll} \textit{quadratic formula}\\\\ x= \cfrac{ - {{ b}} \pm \sqrt { {{ b}}^2 -4{{ a}}{{ c}}}}{2{{ a}}} \end{array}$