There are 1 questions in this calculation: for each question, the 2 derivative of x is calculated.
    Note that variables are case sensitive.
\[ \begin{equation}\begin{split}[1/1]Find\ the\ second\ derivative\ of\ function\ (x - 8)(-5x + 120)\ with\ respect\ to\ x：\\\end{split}\end{equation} \]\[ \begin{equation}\begin{split}\\Solution:&\\ &Primitive\ function\ = -5x^{2} + 160x - 960\\&\color{blue}{The\ first\ derivative\ function：}\\&\frac{d\left( -5x^{2} + 160x - 960\right)}{dx}\\=&-5*2x + 160 + 0\\=&-10x + 160\\\\ &\color{blue}{The\ second\ derivative\ of\ function:} \\&\frac{d\left( -10x + 160\right)}{dx}\\=&-10 + 0\\=&-10\\ \end{split}\end{equation} \]

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