<PRE><B>Question 1128717</B>
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I can determine not only &quot;the nature&quot; of the roots (the term NONSENSICAL in MATH), but their values, too: they are integer numbers 9 and -5.
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Solving quadratic equations is a &amp;nbsp;&lt;U&gt;BASIC &amp;nbsp;ELEMENTARY &amp;nbsp;SKILL&lt;/U&gt; &amp;nbsp;&lt;U&gt;each student &amp;nbsp;MUST &amp;nbsp;DEVELOPE&lt;/U&gt;&amp;nbsp; in his &amp;nbsp;(or her)&amp;nbsp; school years.


To help the students, &amp;nbsp;the lessons were created in this site

&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;- &lt;A HREF=https://www.algebra.com/algebra/homework/quadratic/lessons/Introduction-Into-Quadratics.lesson&gt;Introduction into Quadratic Equations&lt;/A&gt;

&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;- &lt;A HREF=https://www.algebra.com/algebra/homework/quadratic/lessons/proof-of-quadratic-by-completing-the-square.lesson&gt;PROOF of quadratic formula by completing the square&lt;/A&gt;

&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;- &lt;A HREF=https://www.algebra.com/algebra/homework/quadratic/lessons/HOW-TO-solve-quadratic-equation-by-completing-the-square-Learning-by-examples.lesson&gt;HOW TO solve quadratic equation by completing the square - Learning by examples&lt;/A&gt; 

giving the general theory and examples.


Read them and learn on how to solve quadratic equations using the quadratic formula on your own, &amp;nbsp;once and for all.



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