Question 38: Write the result of multiplication\(\left(x^{2}+x+1\right) \cdot(x-3)\) as a descending power of the variable x:
\(\begin{aligned} &\left(x^{2}+x+1\right) \cdot(x-3) \\ &\quad=x^{3}+x^{2}+x- 3 x^{2}-3 x-3 \\ &\quad=x^{3}-2 x^{2}-2 x-3 \end{aligned}\)
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