Posted by Erika on Thursday, September 30, 2010 at 6:25pm.
2xsquared minus 4xsquared
Math - Anonymous, Thursday, September 30, 2010 at 6:27pm
Math - Henry, Thursday, September 30, 2010 at 10:28pm
2x^2 - 4x^2 = -2x^2.
Math - PsyDAG, Friday, October 1, 2010 at 3:05pm
Henry is right.
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