MathJax v3: TeX & MathML to SVG
If $a \ne 0$, then $ax^2 + bx + c = 0$ has two solutions, $$x = {-b \pm \sqrt{b^2-4ac} \over 2a}.$$ As MathML:
a
x
2
+
b
x
+
c
=
0
.