Math easy way

When $a\ne 0$, there are two solutions to $a{x}^2+bx+c=0$ and they are $$x=\frac{-b\pm \sqrt{b^2-4ac}}{2a}.$$
I found that it is not difficult to write math in Web. $a\ne 0$ and $y=ax+b$

This is interesting that I can use equations here. I will write my text a lot. I am wondering also, I can add my code here. This should support it so that I can explain my code as well.

I found that no need to add head here. If the header is not included, script can be used. Because I included script I can write mathematical formulation as well.