Posted by rome on Friday, May 29, 2009 at 1:27am.
I assume you want the given expression factorized.
First take out the common factor of -3 in all the terms to get
-21x^2 +6x-12
=-3(7x^2-2*x+4)
Then see if you can factorize the expression in brackets. If not, the result will be as shown above.
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