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<div style="text-align: center;"> <table style="border: 4px solid #003300; width: 400px; background-color: #ffffcc;" border="4" align="center"> <tbody> <tr> <td style="background-color: #003300;" align="center" valign="middle"><span style="color: #ffff99; font-size: large;" data-mce-mark="1">Punt d'intersecció: igualació</span></td> </tr> <tr> <td> <p style="text-align: justify;"><span style="color: #003300;" data-mce-mark="1"><strong><span style="font-size: small;" data-mce-mark="1">Per igualar, escrivim les dues equacions explícites i igualem per calcular x: </span></strong></span></p> <p style="text-align: justify;"><span style="color: #003300;" data-mce-mark="1"><strong>«math xmlns=¨http://www.w3.org/1998/Math/MathML¨»«mrow mathcolor=¨#003300¨»«mfenced open=¨{¨ close=¨}¨»«mtable»«mtr»«mtd»«mi mathsize=¨12px¨ mathvariant=¨bold¨»y«/mi»«mo mathsize=¨12px¨ mathvariant=¨bold¨»=«/mo»«mn mathsize=¨12px¨ mathvariant=¨bold¨»3«/mn»«mi mathsize=¨12px¨ mathvariant=¨bold¨»x«/mi»«mo mathsize=¨12px¨ mathvariant=¨bold¨»+«/mo»«mn mathsize=¨12px¨ mathvariant=¨bold¨»2«/mn»«/mtd»«/mtr»«mtr»«mtd»«mi mathsize=¨12px¨ mathvariant=¨bold¨»y«/mi»«mo mathsize=¨12px¨ mathvariant=¨bold¨»=«/mo»«mo mathsize=¨12px¨ mathvariant=¨bold¨»-«/mo»«mn mathsize=¨12px¨ mathvariant=¨bold¨»2«/mn»«mi mathsize=¨12px¨ mathvariant=¨bold¨»x«/mi»«mo mathsize=¨12px¨ mathvariant=¨bold¨»-«/mo»«mn mathsize=¨12px¨ mathvariant=¨bold¨»3«/mn»«/mtd»«/mtr»«/mtable»«/mfenced»«mo mathsize=¨12px¨ mathvariant=¨bold¨»§#8660;«/mo»«mn mathsize=¨12px¨ mathvariant=¨bold¨»3«/mn»«mi mathsize=¨12px¨ mathvariant=¨bold¨»x«/mi»«mo mathsize=¨12px¨ mathvariant=¨bold¨»+«/mo»«mn mathsize=¨12px¨ mathvariant=¨bold¨»2«/mn»«mo mathsize=¨12px¨ mathvariant=¨bold¨»=«/mo»«mo mathsize=¨12px¨ mathvariant=¨bold¨»-«/mo»«mn mathsize=¨12px¨ mathvariant=¨bold¨»2«/mn»«mi mathsize=¨12px¨ mathvariant=¨bold¨»x«/mi»«mo mathsize=¨12px¨ mathvariant=¨bold¨»-«/mo»«mn mathsize=¨12px¨ mathvariant=¨bold¨»3«/mn»«mo mathsize=¨12px¨ mathvariant=¨bold¨»§#8660;«/mo»«mn mathsize=¨12px¨ mathvariant=¨bold¨»5«/mn»«mi mathsize=¨12px¨ mathvariant=¨bold¨»x«/mi»«mo mathsize=¨12px¨ mathvariant=¨bold¨»=«/mo»«mo mathsize=¨12px¨ mathvariant=¨bold¨»-«/mo»«mn mathsize=¨12px¨ mathvariant=¨bold¨»5«/mn»«mo mathsize=¨12px¨ mathvariant=¨bold¨»§#8660;«/mo»«mi mathsize=¨12px¨ mathvariant=¨bold¨»x«/mi»«mo mathsize=¨12px¨ mathvariant=¨bold¨»=«/mo»«mo mathsize=¨12px¨ mathvariant=¨bold¨»-«/mo»«mn mathsize=¨12px¨ mathvariant=¨bold¨»1«/mn»«/mrow»«mstyle mathvariant=¨bold¨ mathcolor=¨#003300¨ mathsize=¨12px¨/»«/math»</strong></span></p> <p style="text-align: justify;"><span style="font-size: small;"><span style="font-size: small; color: #003300;"><strong><span style="font-size: small;">Per calcular y, substituïm x per (-1) en qualsevol de les dues equacions: </span></strong></span><strong style="color: #000080; line-height: 1.4;"><span style="font-size: small;"><span style="color: #000080;"><span style="color: #003300;">y = 3·(-1) + 2 = -1 i es tallen en el punt (-1,-1).</span> </span></span></strong></span></p> <p style="text-align: center;"><span style="font-size: medium;"><strong style="color: #006600; line-height: 1.4;">Si dona 0x=0, són</strong></span><span style="font-size: medium;"><strong style="color: #006600; line-height: 1.4;"> coincidents.</strong></span></p> <p style="text-align: center;"><span style="font-size: medium; color: #006600;"><strong style="color: #006600; line-height: 1.4;">Si dona 0x≠0, són paral·leles.</strong></span></p> </td> </tr> </tbody> </table> </div> <div style="text-align: center;"> </div>
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