November 24, 2015

Homework Help: Algebra

Posted by Sandrine on Wednesday, September 16, 2009 at 6:42pm.

I multiplyed x^2-2x+2 times x^2+2x+2. The book suggested the order this be done in as: x^2(x^2-2x+2) then 2x(x^2-2x+2) then 2(x^2-2x+2), with the result being x^4+4. However, I wondered if this could be done in reverse. So I multiplyed x^2(x^2+2x+2), then -2x(x^2+2x=2) then 2(x^2+2x+2). The result however was different. I'm not sure if it was just a computational error or if you really can't do it this way. If you can only do it the first way, why? Thanks!!!

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