Тестирование и разработка

When \(a \ne 0\), there are two solutions to \(ax^2 + bx + c = 0\) and they are \[x = {-b \pm \sqrt{b^2-4ac} \over 2a}.\] $$ x = {-b \pm \sqrt{b^2-4ac} \over 2a} $$ \( x \pm a \)