[Tex/LaTex] \newcommand for quadratic formula


I am looking to create a \newcommand to type in the quadratic formula by using the alias \qf as follows:


However, when I compile, it spits out errors such as Missing $ inserted? What have I done wrong?

Best Answer

Suppose that you write in a LaTeX file since you have x=\frac{-b\pm\sqrt{b^2-4ac}}{2a}, then. You get an error message if you try to compile it, right? That's because you should have written since you have $x=\frac{-b\pm\sqrt{b^2-4ac}}{2a}$, then instead. So, either define


or else keep your definition and use it as since you have $\qf$, then.

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