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<title>A.II.3.5</title>
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<div class="feladat">
<b>Feladat: 3.5.</b><br /> <a name="a_ii_polinom_100718_HP_01" /><a href="bib_box.php?mode=sne-s-j-&amp;citation_num=" target="bib_box" onclick="mutat('bib_box.php?mode=sne-s-j-&amp;citation_num='); return false;"></a>Az <m:math xmlns="http://www.w3.org/1998/Math/MathML">

<m:mrow><m:mi>a</m:mi></m:mrow></m:math> valós együttható mely értéke esetén lesz a <m:math xmlns="http://www.w3.org/1998/Math/MathML">

<m:mrow><m:mn>3</m:mn></m:mrow></m:math> gyöke a

<m:math xmlns="http://www.w3.org/1998/Math/MathML">

<m:mrow><m:mn>2</m:mn>

<m:msup><m:mrow><m:mi>x</m:mi></m:mrow><m:mrow><m:mn>5</m:mn></m:mrow>

</m:msup>

<m:mo>-</m:mo><m:mn>3</m:mn>

<m:msup><m:mrow><m:mi>x</m:mi></m:mrow><m:mrow><m:mn>4</m:mn></m:mrow>

</m:msup>

<m:mo>+</m:mo>

<m:msup><m:mrow><m:mi mathvariant="italic">ax</m:mi></m:mrow><m:mrow><m:mn>3</m:mn></m:mrow>

</m:msup>

<m:mo>-</m:mo>

<m:msup><m:mrow><m:mi>x</m:mi></m:mrow><m:mrow><m:mn>2</m:mn></m:mrow>

</m:msup>

<m:mo>+</m:mo><m:mn>3</m:mn><m:mi>x</m:mi><m:mo>-</m:mo><m:mn>9</m:mn></m:mrow></m:math> polinomnak?
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<div class="feladat">
<a name="_solution_a_ii_polinom_100718_HP_01" /><b>Megoldás: 3.5</b><br />
Behelyettesítve <m:math xmlns="http://www.w3.org/1998/Math/MathML">

<m:mrow><m:mn>3</m:mn></m:mrow></m:math>-at <m:math xmlns="http://www.w3.org/1998/Math/MathML">

<m:mrow><m:mn>234</m:mn><m:mo>+</m:mo><m:mn>27</m:mn><m:mi>a</m:mi></m:mrow></m:math>-t kapunk. Ez pontosan akkor <m:math xmlns="http://www.w3.org/1998/Math/MathML">

<m:mrow><m:mn>0</m:mn></m:mrow></m:math>, ha <m:math xmlns="http://www.w3.org/1998/Math/MathML">

<m:mrow><m:mi>a</m:mi><m:mo>=</m:mo><m:mo>-</m:mo>

<m:mfrac><m:mrow><m:mn>26</m:mn></m:mrow>

<m:mrow><m:mn>3</m:mn></m:mrow>

</m:mfrac>

</m:mrow></m:math>. (Ez persze ugyanaz, mint a <a href="chapter.php?mode=sne-s-j-&amp;volume=a_ii&amp;code=A.II&amp;chapter=chs_a_ii/a_ii_polinom&amp;chapternum=3&amp;topic=Algebra&amp;yearpair=9--10#a_ii_polinom02_051111_HA_03" target="_blank">3.6</a> feladat.)
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