Equations

• Linear equation: \(y = \alpha x + \beta\)

• Quadratic equation: \(ax^2 + bx + c = 0\).
  When \(a \ne 0\), there are two solutions to the above equation: \(x = {-b \pm \sqrt{b^2-4ac} \over 2a}.\)

• Integral: \begin{equation}\label{label} \frac{\mathrm{d}}{\mathrm{d} x} \int_{a}^{x} f(s)ds = f(x) \end{equation}