2009-II-04

21-06-2023 app.cch 尚無留言

答案：A

\begin{array}{cl} (3 x - 5) (2 x^{2} + 5 x - 3) \\ = & 3 x (2 x^{2} + 5 x - 3) - 5 (2 x^{2} + 5 x - 3) \\ = & 6 x^{3} + 15 x^{2} - 9 x - 10 x^{2} - 25 x + 15 \\ = & 6 x^{3} + 5 x^{2} - 34 x + 15 \end{array}