$\begin{align*}2x^2 + 3(x-1)(x-2) & = 2x^2 + 3(x^2-3x+2)\\&= 2x^2 + 3x^2 - 9x + 6\\&= 5x^2 - 9x + 6\end{align*}$
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June 15, 2010 at 5:43 PM
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