Factoring a Quadratic Trinomial
By Roy Peterson
In this learning activity you'll factor an algebraic expression of the form AX(Squared) + BX + C using the FOIL technique.
The target audience of this learning object is trigonometry students who have already learned what a radian is and have already derived the key values of the coordinates associated with common radian units, but now need to practice finding those values on the unit circle. The student does not need to know the definition of the six trig functions to do this activity.
In part 2 of this series, learners follow the steps of the “mathemagician” to examine these numerical curiosities: The 189 Challenge; An Armstrong Number: What’s Special About 153? Is 495 Different or Indifferent? Is 6174 Different or Indifferent? It is always 618, and Beginning and Ending the Same.
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I have to say that this site has been working very well for me. I was not very fond of factoring but this tutorial had made it more bearable for me. Great teaching Techniques. Thank you Wisc-OnlinePosted by daniel trujillo on 11/1/2012 6:18:09 PM Reply
I thought this was a great tutorial, but I think it is worthwhile to note that it works for ANY quadratic that is factorable, even when A = 1! Just because students might recognize a "shortcut" when a = 1 doesnt mean this procedure cant work. It works for a difference of squares as well when b = 0; It is significant to note that if the two numbers you are looking for canNOT be found (do not exist), then the quadratic is not factorable (PRIME)Posted by Julie Anderson on 4/26/2009 12:00:00 AM Reply