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<title>3.3</title>
<id>https://peda.net/id/d3a5f170cc7</id>
<updated>2018-10-10T14:08:33+03:00</updated>
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<rights type="html">&lt;div class=&quot;license&quot;&gt;Tämän sivun lisenssi &lt;a rel=&quot;license&quot; href=&quot;https://peda.net/info&quot;&gt;Peda.net-yleislisenssi&lt;/a&gt;&lt;/div&gt;&#10;</rights>

<entry>
<title>358</title>
<id>https://peda.net/id/5c174df4cc8</id>
<updated>2018-10-10T15:02:28+03:00</updated>
<link href="https://peda.net/p/oskari.lahtinen/mpjy/3-3/358#top" />
<content type="html">&lt;img src=&quot;https://math-demo.abitti.fi/math.svg?latex=D%5Cge0&quot; alt=&quot;D\ge0&quot;/&gt;&lt;br/&gt;&#10;&lt;img src=&quot;https://math-demo.abitti.fi/math.svg?latex=D%3Db%5E2-4%5Ccdot%5Cleft(-2%5Cright)%5Ccdot%5Cleft(-3%5Cright)&quot; alt=&quot;D=b^2-4\cdot\left(-2\right)\cdot\left(-3\right)&quot;/&gt;&lt;br/&gt;&#10;&lt;img src=&quot;https://math-demo.abitti.fi/math.svg?latex=b%5E2-24%5Cge0&quot; alt=&quot;b^2-24\ge0&quot;/&gt;&lt;br/&gt;&#10;&lt;img src=&quot;https://math-demo.abitti.fi/math.svg?latex=b%5E2%5Cge24&quot; alt=&quot;b^2\ge24&quot;/&gt;&lt;br/&gt;&#10;&lt;img src=&quot;https://math-demo.abitti.fi/math.svg?latex=5%5E2%5Cge24&quot; alt=&quot;5^2\ge24&quot;/&gt;&lt;br/&gt;&#10;b&amp;lt;5</content>
<published>2018-10-10T15:02:28+03:00</published>
</entry>

<entry>
<title>351</title>
<id>https://peda.net/id/a3696044cc8</id>
<updated>2018-10-10T14:57:21+03:00</updated>
<link href="https://peda.net/p/oskari.lahtinen/mpjy/3-3/351#top" />
<content type="html">a) c+1&lt;br/&gt;&#10;b)&lt;br/&gt;&#10;&lt;img src=&quot;https://math-demo.abitti.fi/math.svg?latex=x%5E2%2B3x%2Bc%2B1&quot; alt=&quot;x^2+3x+c+1&quot;/&gt;&lt;br/&gt;&#10;&lt;img src=&quot;https://math-demo.abitti.fi/math.svg?latex=D%3D0&quot; alt=&quot;D=0&quot;/&gt;&lt;br/&gt;&#10;&lt;img src=&quot;https://math-demo.abitti.fi/math.svg?latex=D%3D3%5E2-4%5Ccdot1%5Ccdot%5Cleft(c%2B1%5Cright)&quot; alt=&quot;D=3^2-4\cdot1\cdot\left(c+1\right)&quot;/&gt;&lt;br/&gt;&#10;&lt;img src=&quot;https://math-demo.abitti.fi/math.svg?latex=9-4%5Ccdot1%5Ccdot%20c%2B1%3D0&quot; alt=&quot;9-4\cdot1\cdot c+1=0&quot;/&gt;&lt;br/&gt;&#10;&lt;img src=&quot;https://math-demo.abitti.fi/math.svg?latex=9%3D4%5Ccdot%5Cleft(c%2B1%5Cright)&quot; alt=&quot;9=4\cdot\left(c+1\right)&quot;/&gt;&lt;br/&gt;&#10;&lt;img src=&quot;https://math-demo.abitti.fi/math.svg?latex=9%3D4c%2B4&quot; alt=&quot;9=4c+4&quot;/&gt;&lt;br/&gt;&#10;&lt;img src=&quot;https://math-demo.abitti.fi/math.svg?latex=5%3D4c&quot; alt=&quot;5=4c&quot;/&gt;&lt;br/&gt;&#10;&lt;img src=&quot;https://math-demo.abitti.fi/math.svg?latex=c%3D1%7B%2C%7D25&quot; alt=&quot;c=1{,}25&quot;/&gt;&lt;br/&gt;&#10;c)&lt;br/&gt;&#10;&lt;a href=&quot;https://peda.net/p/oskari.lahtinen/mpjy/3-3/351/sieppaa-png#top&quot; title=&quot;Sieppaa.PNG&quot;&gt;&lt;img src=&quot;https://peda.net/p/oskari.lahtinen/mpjy/3-3/351/sieppaa-png:file/photo/355db8682617a6d84ace1f9e69d25b20808571d8/Sieppaa.PNG&quot; alt=&quot;&quot; title=&quot;Sieppaa.PNG&quot; class=&quot;inline&quot; loading=&quot;lazy&quot;/&gt;&lt;/a&gt;</content>
<published>2018-10-10T14:57:18+03:00</published>
</entry>

<entry>
<title>360</title>
<id>https://peda.net/id/40dd7acecc8</id>
<updated>2018-10-10T14:47:57+03:00</updated>
<link href="https://peda.net/p/oskari.lahtinen/mpjy/3-3/360#top" />
<content type="html">&lt;img src=&quot;https://math-demo.abitti.fi/math.svg?latex=ax%5E2%2Bbx%2Bc&quot; alt=&quot;ax^2+bx+c&quot;/&gt;&lt;br/&gt;&#10;&lt;div&gt;&lt;img src=&quot;https://math-demo.abitti.fi/math.svg?latex=D%3Db%5E2-4ac&quot; alt=&quot;D=b^2-4ac&quot;/&gt; joko a tai c on negatiivinen&lt;/div&gt;&#10;&lt;img src=&quot;https://math-demo.abitti.fi/math.svg?latex=b%5E2%2B4ac%5C%20ja%5C%20D%3E0%7B%2C%7D%5C%20eli%5C%20yht%C3%A4l%C3%B6ll%C3%A4%5C%20on%5C%20kaksi%5C%20nollakohtaa&quot; alt=&quot;b^2+4ac\ ja\ D&amp;gt;0{,}\ eli\ yhtälöllä\ on\ kaksi\ nollakohtaa&quot;/&gt;</content>
<published>2018-10-10T14:47:24+03:00</published>
</entry>

<entry>
<title>353</title>
<id>https://peda.net/id/9c438710cc8</id>
<updated>2018-10-11T10:11:17+03:00</updated>
<link href="https://peda.net/p/oskari.lahtinen/mpjy/3-3/353#top" />
<content type="html">a)&lt;br/&gt;&#10;&lt;img src=&quot;https://math-demo.abitti.fi/math.svg?latex=ax%5E2-6x-10%3D0&quot; alt=&quot;ax^2-6x-10=0&quot;/&gt;&lt;br/&gt;&#10;&lt;img src=&quot;https://math-demo.abitti.fi/math.svg?latex=D%3D0&quot; alt=&quot;D=0&quot;/&gt;&lt;br/&gt;&#10;&lt;img src=&quot;https://math-demo.abitti.fi/math.svg?latex=D%3Db%5E2-4ac&quot; alt=&quot;D=b^2-4ac&quot;/&gt;&lt;br/&gt;&#10;&lt;img src=&quot;https://math-demo.abitti.fi/math.svg?latex=%5Cleft(-6%5Cright)%5E2-4%5Ccdot%20a%5Ccdot%5Cleft(-10%5Cright)&quot; alt=&quot;\left(-6\right)^2-4\cdot a\cdot\left(-10\right)&quot;/&gt;&lt;br/&gt;&#10;&lt;img src=&quot;https://math-demo.abitti.fi/math.svg?latex=36%2B40a%3D0&quot; alt=&quot;36+40a=0&quot;/&gt;&lt;br/&gt;&#10;&lt;img src=&quot;https://math-demo.abitti.fi/math.svg?latex=40a%3D-36%5C%20%5Cparallel%3A40&quot; alt=&quot;40a=-36\ \parallel:40&quot;/&gt;&lt;br/&gt;&#10;&lt;img src=&quot;https://math-demo.abitti.fi/math.svg?latex=a%3D-0%7B%2C%7D9&quot; alt=&quot;a=-0{,}9&quot;/&gt; tai a=0, koska silloin yhtälö on ensimmäisen asteen yhtälö, jolla on vain yksi ratkaisu&lt;br/&gt;&#10;b)&lt;br/&gt;&#10;D&amp;gt;0, eli kaikki a arvot, jotka ovat suurempia kuin -0,9 ja a =/= 0</content>
<published>2018-10-10T14:42:47+03:00</published>
</entry>

<entry>
<title>355</title>
<id>https://peda.net/id/65f0e352cc8</id>
<updated>2018-10-11T10:15:58+03:00</updated>
<link href="https://peda.net/p/oskari.lahtinen/mpjy/3-3/355#top" />
<content type="html">a) &lt;br/&gt;&#10;&lt;img src=&quot;https://math-demo.abitti.fi/math.svg?latex=-x%5E2-4x-4%3D0&quot; alt=&quot;-x^2-4x-4=0&quot;/&gt;&lt;br/&gt;&#10;&lt;img src=&quot;https://math-demo.abitti.fi/math.svg?latex=D%3Db%5E2-4ac&quot; alt=&quot;D=b^2-4ac&quot;/&gt;&lt;br/&gt;&#10;&lt;img src=&quot;https://math-demo.abitti.fi/math.svg?latex=%5Cleft(-4%5Cright)%5E2-4%5Ccdot%5Cleft(-1%5Cright)%5Ccdot%5Cleft(-4%5Cright)%3D16-16%3D0&quot; alt=&quot;\left(-4\right)^2-4\cdot\left(-1\right)\cdot\left(-4\right)=16-16=0&quot;/&gt;&lt;br/&gt;&#10;yhtälön diskriminantti on yhtä suuri kuin nolla, eli yhtälöllä on vain yksi nollakohta, eli paraabelin huippu&lt;br/&gt;&#10;b)&lt;br/&gt;&#10;&lt;img src=&quot;https://math-demo.abitti.fi/math.svg?latex=2x%5E2%2B3x%2B4%3D0&quot; alt=&quot;2x^2+3x+4=0&quot;/&gt;&lt;br/&gt;&#10;&lt;img src=&quot;https://math-demo.abitti.fi/math.svg?latex=D%3Db%5E2-4ac&quot; alt=&quot;D=b^2-4ac&quot;/&gt;&lt;br/&gt;&#10;&lt;img src=&quot;https://math-demo.abitti.fi/math.svg?latex=3%5E2-4%5Ccdot2%5Ccdot4%3D9-32%3D-23&quot; alt=&quot;3^2-4\cdot2\cdot4=9-32=-23&quot;/&gt;&lt;br/&gt;&#10;yhtälön diskriminantti on pienempi kuin nolla, eli yhtälöllä ei ole ratkaisua eikä siten saa arvoa -5&lt;br/&gt;&#10;c)&lt;br/&gt;&#10;jos diskriminantti eli juurrettava on nolla, sen voi sieventää pois toisen yhtälön ratkaisukaavasta näin&lt;br/&gt;&#10;&lt;img src=&quot;https://math-demo.abitti.fi/math.svg?latex=D%3D0&quot; alt=&quot;D=0&quot;/&gt;&#10;&lt;div&gt;&lt;img src=&quot;https://math-demo.abitti.fi/math.svg?latex=x%3D%5Cfrac%7B-b%5Cpm%5Csqrt%7BD%7D%7D%7B2a%7D%3D%5Cfrac%7B-b%7D%7B2a%7D&quot; alt=&quot;x=\frac{-b\pm\sqrt{D}}{2a}=\frac{-b}{2a}&quot;/&gt;&lt;/div&gt;&#10;</content>
<published>2018-10-10T14:34:07+03:00</published>
</entry>

<entry>
<title>354</title>
<id>https://peda.net/id/9d3ed20ccc7</id>
<updated>2018-10-10T14:28:30+03:00</updated>
<link href="https://peda.net/p/oskari.lahtinen/mpjy/3-3/354#top" />
<content type="html">a) 3x^2+14x+13=0&lt;br/&gt;&#10;b) x^2+2x+1=0&lt;br/&gt;&#10;c) x^2-5x+7=0</content>
<published>2018-10-10T14:28:30+03:00</published>
</entry>

<entry>
<title>356</title>
<id>https://peda.net/id/368bdb4acc7</id>
<updated>2018-10-10T14:25:38+03:00</updated>
<link href="https://peda.net/p/oskari.lahtinen/mpjy/3-3/356#top" />
<content type="html">&lt;img src=&quot;https://math-demo.abitti.fi/math.svg?latex=3x%5E2%2B14x%2B13%3D0&quot; alt=&quot;3x^2+14x+13=0&quot;/&gt;&lt;br/&gt;&#10;&lt;img src=&quot;https://math-demo.abitti.fi/math.svg?latex=D%3Db%5E2-4ac&quot; alt=&quot;D=b^2-4ac&quot;/&gt;&lt;br/&gt;&#10;&lt;img src=&quot;https://math-demo.abitti.fi/math.svg?latex=14%5E2-4%5Ccdot3%5Ccdot13&quot; alt=&quot;14^2-4\cdot3\cdot13&quot;/&gt;&lt;br/&gt;&#10;&lt;img src=&quot;https://math-demo.abitti.fi/math.svg?latex=196-156%3D40&quot; alt=&quot;196-156=40&quot;/&gt;&lt;br/&gt;&#10;&lt;img src=&quot;https://math-demo.abitti.fi/math.svg?latex=D%3E0%7B%2C%7D%5C%20eli%5C%20yht%C3%A4l%C3%B6ll%C3%A4%5C%20on%5C%20kaksi%5C%20ratkaisua%5C%20eli%5C%20juurta&quot; alt=&quot;D&amp;gt;0{,}\ eli\ yhtälöllä\ on\ kaksi\ ratkaisua\ eli\ juurta&quot;/&gt;</content>
<published>2018-10-10T14:25:38+03:00</published>
</entry>

<entry>
<title>346</title>
<id>https://peda.net/id/a5cf13decc7</id>
<updated>2018-10-10T14:14:25+03:00</updated>
<link href="https://peda.net/p/oskari.lahtinen/mpjy/3-3/346#top" />
<content type="html">a)&lt;br/&gt;&#10;&lt;img src=&quot;https://math-demo.abitti.fi/math.svg?latex=3x%5E2-4x-2%3D0&quot; alt=&quot;3x^2-4x-2=0&quot;/&gt;&lt;br/&gt;&#10;&lt;img src=&quot;https://math-demo.abitti.fi/math.svg?latex=D%3Db%5E2-4ac%3D%5Cleft(-4%5Cright)%5E2-4%5Ccdot3%5Ccdot%5Cleft(-2%5Cright)&quot; alt=&quot;D=b^2-4ac=\left(-4\right)^2-4\cdot3\cdot\left(-2\right)&quot;/&gt;&lt;br/&gt;&#10;&lt;img src=&quot;https://math-demo.abitti.fi/math.svg?latex=16%2B24%3D40&quot; alt=&quot;16+24=40&quot;/&gt;&lt;br/&gt;&#10;&lt;img src=&quot;https://math-demo.abitti.fi/math.svg?latex=D%3E0%7B%2C%7D%5C%20eli%5C%20yht%C3%A4l%C3%B6ll%C3%A4%5C%20on%5C%20kaksi%5C%20ratkaisua&quot; alt=&quot;D&amp;gt;0{,}\ eli\ yhtälöllä\ on\ kaksi\ ratkaisua&quot;/&gt;&lt;br/&gt;&#10;b)&lt;br/&gt;&#10;&lt;img src=&quot;https://math-demo.abitti.fi/math.svg?latex=x%5E2-5x%2B7%3D0&quot; alt=&quot;x^2-5x+7=0&quot;/&gt;&lt;br/&gt;&#10;&lt;img src=&quot;https://math-demo.abitti.fi/math.svg?latex=D%3Db%5E2-4ac&quot; alt=&quot;D=b^2-4ac&quot;/&gt;&lt;br/&gt;&#10;&lt;img src=&quot;https://math-demo.abitti.fi/math.svg?latex=%5Cleft(-5%5Cright)%5E2-4%5Ccdot1%5Ccdot7%3D25-28%3D-3&quot; alt=&quot;\left(-5\right)^2-4\cdot1\cdot7=25-28=-3&quot;/&gt;&lt;br/&gt;&#10;&lt;img src=&quot;https://math-demo.abitti.fi/math.svg?latex=D%3C-3&quot; alt=&quot;D&amp;lt;-3&quot;/&gt;&lt;br/&gt;&#10;&lt;img src=&quot;https://math-demo.abitti.fi/math.svg?latex=D%3C0%7B%2C%7D%5C%20eli%5C%20yht%C3%A4l%C3%B6ll%C3%A4%5C%20ei%5C%20ole%5C%20ratkaisuja&quot; alt=&quot;D&amp;lt;0{,}\ eli\ yhtälöllä\ ei\ ole\ ratkaisuja&quot;/&gt;</content>
<published>2018-10-10T14:14:25+03:00</published>
</entry>


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