MathJax v3: TeX & MathML to HTML

<!-- Enter HTML containing TeX or MathML below --> If $a \ne 0$, then $ax^2 + bx + c = 0$ has two solutions, $$x = {-b \pm \sqrt{b^2-4ac} \over 2a}.$$ As MathML: <math> <mi>a</mi> <msup> <mi>x</mi> <mn>2</mn> </msup> <mo>+</mo> <mi>b</mi> <mi>x</mi> <mo>+</mo> <mi>c</mi> <mo>=</mo> <mn>0</mn> </math>.