Posted by ted on Thursday, July 5, 2012 at 10:47pm.
how do you factor X^3+X^2-9X-9
pls help. I don't know what to do
- math - Reiny, Thursday, July 5, 2012 at 11:02pm
looks like grouping might be the simplest way ...
= x^2(x+1) - 9(x+1)
= (x+1)(x^2-9) and now I see a difference of squares
- math - Steve, Friday, July 6, 2012 at 10:01am
or, noting the "9" :-)
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