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 <question type="category"><category><text>4t ESO/4.04 EQUACIONS/4.04.3 Sistemes/4.04.3.3 Sistemes no lineals</text></category></question>
 
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      <text>4.04.3.3.00 TEORIA Sistemes NO LINEALS</text>
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      <text><![CDATA[<table style="border: 4px solid #000066; float: none; text-align: left; vertical-align: top; color: #000066; width: 400px; background-image: url('http://www.insmilaifontanals.cat/none'); background-color: #ffffcc;" border="4" frame="void" rules="none" align="center">
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<td style="background-color: #000066; background-image: none; color: #ffcc00; border-color: #000066; border-width: 4px; vertical-align: top; border-style: none; text-align: center;" valign="top" width="100%"><span style="font-size: large; color: #ffff99;">Resolució de sistemes no lineals</span></td>
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<td style="background-color: #ffffcc; background-image: none; color: #000066; border-color: #000066; border-width: 4px; text-align: left; vertical-align: top; border-style: none;" valign="top" width="100%"><strong><span style="font-size: small; color: #000080;">Un sistema no lineal es resol per substitució.</span></strong><br style="font-weight: bold;" /><strong><span style="font-size: small; color: #000080;">Exemple:</span></strong><br /><strong><span style="font-size: small; color: #000080;">«math xmlns=¨http://www.w3.org/1998/Math/MathML¨»«mfenced close=¨¨ open=¨{¨»«mtable»«mtr»«mtd»«mi mathvariant=¨bold¨»x«/mi»«mo»+«/mo»«mi mathvariant=¨bold¨»y«/mi»«mo»=«/mo»«mn»6«/mn»«/mtd»«/mtr»«mtr»«mtd»«msup»«mi mathvariant=¨bold¨»x«/mi»«mn»2«/mn»«/msup»«mo»+«/mo»«msup»«mi mathvariant=¨bold¨»y«/mi»«mn»2«/mn»«/msup»«mo»=«/mo»«mn»20«/mn»«/mtd»«/mtr»«/mtable»«/mfenced»«/math»</span></strong><br style="font-weight: bold;" /><strong><span style="font-size: small; color: #000080;">Aïllem y en la primera equació: y = 6 - x</span></strong><br style="font-weight: bold;" /><strong><span style="font-size: small; color: #000080;">Substituïm en la segona equació: x<sup style="font-weight: bold;">2</sup> + (6-x)<sup style="font-weight: bold;">2</sup> = 20 i resolem el 2n grau.</span></strong><br /><strong><span style="font-size: small; color: #000080;">Solucions: (2,4) i (4,2)</span></strong></td>
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