Monday, March 05, 2007
factoring using grouping method
posted by Jenny at 11:54 p.m.
Factor: 2x^2 + 7x - 4



In general, remember that "ax^2 + bx + c" means you have to find the factors of ac that add up to b

First, times the terms a and c. Second, find factors of ac that add up to b.
Add the two factors into the equation, then fully factor the equation. You can use the FOIL method to check if your answer brings you back to the original equation.
Don't get it? Don't worry =)
check out this helpful link:
http://www.rock.uwc.edu/facultypages/galexand/baw/thirteen/lesson13.htm

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At March 06, 2007 9:20 a.m., Blogger Ms. Armstrong

This is a great link that you have found. It gives people an explanation of how to do the grouping method and then gives lots of practise questions and an answer key. No excuses now for anyone that is having trouble with the grouping method.

 


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