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 <question type="category"><category><text>4t ESO/4.03 POLINOMIS/4.03.3 Polinomis i geometria</text></category></question>
 
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      <text>4.03.3.10 TEORIA: DIFERÈNCIA DE QUADRATS</text>
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<td valign="top" width="NaNpx"><span style="font-size: large; color: #ffff99;">Diferència de quadrats</span></td>
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<div align="center"><span style="color: #000000; font-size: x-large;"><strong><em>(<span style="color: #0000ff;">a</span> + <span style="color: #ff0000;">b</span>) (<span style="color: #0000ff;">a</span> - <span style="color: #ff0000;">b</span>) = </em></strong></span><span style="color: #000000; font-size: x-large;"><strong><em><span style="color: #0000ff;">a</span><sup>2</sup> - <span style="color: #ff0000;">b</span><sup>2</sup></em></strong></span><span style="font-size: x-large;"><br /></span></div>
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<div align="left"><span style="color: #000000;"><em>Exemples:<br /></em><strong><em>(<span style="color: #0000ff;">4x</span> + <span style="color: #ff0000;">9</span>)(<span style="color: #0000ff;">4x</span> – <span style="color: #ff0000;">9</span>) = (<span style="color: #0000ff;">4x</span>)<sup>2</sup> – (<span style="color: #ff0000;">9</span>)<sup>2</sup> = 16x<sup>2 </sup>– 81</em></strong></span><br /><span style="color: #000000;"><strong><em>(<span style="color: #0000ff;">2x<sup>3</sup></span> + <span style="color: #ff0000;">5y</span>)(<span style="color: #0000ff;">2x<sup>3</sup></span> – <span style="color: #ff0000;">5y</span>) = (<span style="color: #0000ff;">2x<sup>3</sup></span>)<sup>2</sup> – (<span style="color: #ff0000;">5y</span>)<sup>2</sup> = 4x<sup>6 </sup>– 25y<sup>2</sup></em></strong></span></div>
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