The easiest way to do this problem would be to first factor out the -4
Now notice this is a difference of squares so we can factor it as
9-4x^2: I don't know where to begin with this one. There are no examples in the book and no odd numbered similar problems so that I could possibly reverse engineer the problem.
12a^2 +24a: for this one I started with 12(a+1)(a+2). From there I went on to several different variations but came up empty. Wait... is 12a(a+2) the right answer?
Any and all help is much appreciated. Thanks!
Okay. The reason I was having difficulty with it is because it appeared to have been written backwards. As 4x^2 -9, I'm okay. So then what I should do when a difference of squares problem is written this way is to simply rewrite it as 4x^2 -9 and proceed normally?
You correctly corrected yourself on the other.
Sorry Bacterius...let's call it a dead-heat![/QUOTE]
Why would you want to do that ? Just notice that is a square as well as and off you go, right ?So then what I should do when a difference of squares problem is written this way is to simply rewrite it as 4x^2 -9 and proceed normally?
It's ok, I really need we need some sort of mutex system on MHF where people can be warned that someone has posted just before them ... so they can reconsider their post. I might bump the idea soon if no-one can be bothered to notify it.Sorry Bacterius...let's call it a dead-heat!
[QUOTE=Ingersoll;541232]Okay. The reason I was having difficulty with it is because it appeared to have been written backwards. As 4x^2 -9, I'm okay. So then what I should do when a difference of squares problem is written this way is to simply rewrite it as 4x^2 -9 and proceed normally?
[QUOTE]
As others have pointed out and are both the "a difference of squares"- but not the same thing: and are different expressions and have different factorings.
You could have written but is simpler.
You correctly corrected yourself on the other.
Sorry Bacterius...let's call it a dead-heat!