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		<id>https://wiki.mattekollen.se/index.php?action=history&amp;feed=atom&amp;title=2.2_L%C3%B6sning_2b</id>
		<title>2.2 Lösning 2b - Versionshistorik</title>
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		<updated>2026-11-05T14:28:33Z</updated>
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		<id>https://wiki.mattekollen.se/index.php?title=2.2_L%C3%B6sning_2b&amp;diff=12625&amp;oldid=prev</id>
		<title>Taifun den 7 augusti 2014 kl. 14.53</title>
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				<updated>2014-08-07T14:53:08Z</updated>
		
		<summary type="html">&lt;p&gt;&lt;/p&gt;
&lt;p&gt;&lt;b&gt;Ny sida&lt;/b&gt;&lt;/p&gt;&lt;div&gt;&amp;lt;math&amp;gt; f(2) = -3\cdot 2^2 + 2\cdot 2 - 12 = -3\cdot 4 + 4 - 12 = -12 + 4 - 12 = -20 &amp;lt;/math&amp;gt;&lt;br /&gt;
&lt;br /&gt;
&amp;lt;math&amp;gt; f(-2) = -3\cdot (-2)^2 + 2\cdot (-2) - 12 = -3\cdot 4 - 4 - 12 = -28 &amp;lt;/math&amp;gt;&lt;br /&gt;
&lt;br /&gt;
&lt;br /&gt;
&amp;lt;big&amp;gt;&amp;lt;big&amp;gt;&amp;lt;math&amp;gt; {\Delta y \over \Delta x} = {f(2)\,-\,f(-2) \over 2\,-\,(-2)} = {-20\,-\,(-28) \over 4} = {8 \over 4} &amp;lt;/math&amp;gt;&amp;lt;/big&amp;gt;&amp;lt;/big&amp;gt; &amp;lt;math&amp;gt; = \, 2 &amp;lt;/math&amp;gt;&lt;/div&gt;</summary>
		<author><name>Taifun</name></author>	</entry>

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