| 14 | | <?xml version="1.0" encoding="UTF-8"?> |
| 15 | | <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1 plus MathML 2.0//EN" |
| 16 | | "http://www.w3.org/TR/MathML2/dtd/xhtml-math11-f.dtd" > |
| 17 | | |
| 18 | | <math display="block"> |
| 19 | | <mrow> |
| 20 | | <mi>x</mi> |
| 21 | | <mo>=</mo> |
| 22 | | <mfrac> |
| 23 | | <mrow> |
| 24 | | <mo form="prefix">−</mo> |
| 25 | | <mi>b</mi> |
| 26 | | <mo>±</mo> |
| 27 | | <msqrt> |
| 28 | | <msup> |
| 29 | | <mi>b</mi> |
| 30 | | <mn>2</mn> |
| 31 | | </msup> |
| 32 | | <mo>−</mo> |
| 33 | | <mn>4</mn> |
| 34 | | <mo>⁢</mo> |
| 35 | | <mi>a</mi> |
| 36 | | <mo>⁢</mo> |
| 37 | | <mi>c</mi> |
| 38 | | </msqrt> |
| 39 | | </mrow> |
| 40 | | <mrow> |
| 41 | | <mn>2</mn> |
| 42 | | <mo>⁢</mo> |
| 43 | | <mi>a</mi> |
| 44 | | </mrow> |
| 45 | | </mfrac> |
| 46 | | </mrow> |
| 47 | | </math> |
| 48 | | }}} |