Mathjax

# Test

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

• $a \ne 0$
• \$$ax^2 + bx + c = 0\$$
• $$x = {-b \pm \sqrt{b^2-4ac} \over 2a}$$