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<p> </p> <table style="color: #003300; border: 4px solid #003300; float: none; text-align: left; vertical-align: top; width: 400px; background-image: none; background-color: #ffffcc;" border="4" frame="void" rules="none" align="center"> <tbody> <tr align="center"> <td style="background-color: #003300; background-image: none; color: #ffcc00; vertical-align: top; border-style: none; text-align: center;" valign="top" width="100%"><span style="color: #ffff99; font-size: large;">Suma i producte de les solucions</span></td> </tr> <tr> <td rowspan="1" valign="top" width="100%"><span style="font-weight: bold; font-size: small;">Quan l'equació de 2n grau té solucions:<br />dues: x<sub>1</sub> i x<sub>2</sub> o una doble x<sub>1</sub> = x<sub>2</sub>, </span><br style="font-weight: bold;" /> <ul> <li style="font-weight: bold;"><span style="font-size: small;">la suma de les solucions és igual a <span class="nolink">«math xmlns=¨http://www.w3.org/1998/Math/MathML¨»«mi mathvariant=¨bold¨»S«/mi»«mo»§nbsp;«/mo»«mo»=«/mo»«mo»§nbsp;«/mo»«mo»-«/mo»«mfrac»«mi mathvariant=¨bold¨»b«/mi»«mi mathvariant=¨bold¨»a«/mi»«/mfrac»«/math»</span></span></li> <li><span style="font-size: small;"><span style="font-weight: bold;">el producte de les solucions és igual a </span><span class="nolink">«math xmlns=¨http://www.w3.org/1998/Math/MathML¨»«mi mathvariant=¨bold¨»P«/mi»«mo»§nbsp;«/mo»«mo»=«/mo»«mo»§nbsp;«/mo»«mfrac»«mi mathvariant=¨bold¨»c«/mi»«mi mathvariant=¨bold¨»a«/mi»«/mfrac»«/math»</span></span></li> </ul> </td> </tr> </tbody> </table>
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