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<p>Scegli quale principio o legge è stata applicata nel passaggio che vedi.</p>
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<table border="0"> <tbody> <tr> <td><strong><span>Primo principio </span></strong></td> <td>Aggiungendo o sottraendo <em>ad ambo i membri</em> di un'equazione <em>uno stesso numero o espressione</em> si ottiene un'equazione equivalente a quella data.</td> </tr> <tr> <td><strong><span>Secondo principio</span></strong></td> <td>Moltiplicando o dividendo <em> ambo i membri</em> di un'equazione <em>uno stesso numero o espressione</em> <span><span style="background-color: #ffff99;">diversa da zero</span> </span>si ottiene un'equazione equivalente a quella data.</td> </tr> <tr> <td><span><strong>Legge dell'annullamento del prodotto</strong></span> </td> <td>Il prodotto di due o più fattori è nullo se almeno uno dei fattori è nullo.</td> </tr> </tbody> </table> <p> </p> <p> </p> <p> </p> <p> </p>
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<p>Quale principio è stato utilizzato in questo passaggio?</p> <p>«math xmlns=¨http://www.w3.org/1998/Math/MathML¨»«mfrac»«mrow»«mi»x«/mi»«mo»-«/mo»«mn»1«/mn»«/mrow»«mrow»«mi»x«/mi»«mo»(«/mo»«mi»x«/mi»«mo»+«/mo»«mn»1«/mn»«mo»)«/mo»«/mrow»«/mfrac»«mo»=«/mo»«mfrac»«mn»2«/mn»«mrow»«mi»x«/mi»«mo»(«/mo»«mi»x«/mi»«mo»+«/mo»«mn»1«/mn»«mo»)«/mo»«/mrow»«/mfrac»«mspace linebreak=¨newline¨/»«mi»x«/mi»«mo»-«/mo»«mn»1«/mn»«mo»=«/mo»«mn»2«/mn»«mspace linebreak=¨newline¨/»«/math»</p>
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<p>Quale principio è stato utilizzato in questo passaggio?</p> <p>«math xmlns=¨http://www.w3.org/1998/Math/MathML¨»«mfrac»«mn»1«/mn»«mn»2«/mn»«/mfrac»«mi»x«/mi»«mo»=«/mo»«mn»1«/mn»«mo»§#8594;«/mo»«mi»x«/mi»«mo»=«/mo»«mn»2«/mn»«/math»</p>
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<p>«math xmlns=¨http://www.w3.org/1998/Math/MathML¨»«mn»4«/mn»«mi»x«/mi»«mo»-«/mo»«mn»2«/mn»«mo»=«/mo»«mn»6«/mn»«mspace linebreak=¨newline¨/»«mn»2«/mn»«mi»x«/mi»«mo»-«/mo»«mn»1«/mn»«mo»=«/mo»«mn»3«/mn»«mspace linebreak=¨newline¨/»«/math»</p>
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Wednesday, 26 October 2016, 9:53 AM
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