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<div align="left"> </div> <div style="text-align: center;" align="center"> <table style="color: #003300; border: 4px solid #000066; 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 align="center"> <tr> <td style="background-color: #003300; background-image: none; color: #ffcc00; border-color: #000066; border-width: 4px; vertical-align: top; border-style: solid; text-align: center;" valign="top" width="100%"><span style="font-size: large; color: #ffff99;">Càlcul del discriminant</span></td> </tr> <tr> <td valign="top" width="100%"> <p><span style="font-size: small; color: #003300;"><span style="font-weight: bold;">El discriminant d'una equació de 2n grau, </span></span></p> <p><span style="color: #003300;"><span style="font-size: small;"><span style="font-weight: bold;">ax</span><sup style="font-weight: bold;">2</sup></span><span style="font-weight: bold;"><span style="font-size: small;"> + bx + c = 0, es calcula amb:</span> </span></span><br style="font-weight: bold;" /><br style="font-weight: bold;" /></p> <div style="text-align: center;"><span class="nolink">«math xmlns=¨http://www.w3.org/1998/Math/MathML¨»«mi mathvariant=¨bold¨»§#916;«/mi»«mo»§nbsp;«/mo»«mo»=«/mo»«mo»§nbsp;«/mo»«msup»«mi mathvariant=¨bold¨»b«/mi»«mn»2«/mn»«/msup»«mo»§nbsp;«/mo»«mo»-«/mo»«mo»§nbsp;«/mo»«mfenced close=¨]¨ open=¨[¨»«mrow»«mn»4«/mn»«mo»·«/mo»«mi mathvariant=¨bold¨»a«/mi»«mo»·«/mo»«mi mathvariant=¨bold¨»c«/mi»«/mrow»«/mfenced»«/math»</span></div> <div style="text-align: center;"><br style="font-weight: bold;" /> <div style="text-align: justify;"><span style="font-size: small; color: #003300;"><span style="font-size: medium;"><span style="font-weight: bold;">b</span><sup style="font-weight: bold;">2</sup></span><span style="font-weight: bold;"><span style="font-size: medium;"> és</span> <span style="text-decoration: underline; font-size: medium;">sempre positiu</span>. </span></span><br style="font-weight: bold;" /><span style="font-weight: bold; font-size: small; color: #003300;">Cal prestar atenció:</span><br style="font-weight: bold;" /> <ul> <li style="font-weight: bold;"><span style="font-size: small;"><span style="color: #ff6600; text-decoration: underline;">als signes</span> <span style="color: #003300;">de a i c (pel signe de 4·a·c)</span></span></li> <li><span style="font-weight: bold; font-size: small;"><span style="color: #003300;"> al fet que 4·a·c s'ha de</span> <span style="color: #ff6600; text-decoration: underline;">restar</span></span></li> </ul> </div> </div> </td> </tr> </tbody> </table> </div> <div align="left"> </div>
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Thursday, 23 August 2018, 11:09 AM
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