Question
Answer
$$x^3-3x^2-2x+8+x^3+2x+8=2x^3-3x^2+16$$
Explanation
| $$ \begin{aligned}x^3-3x^2-2x+8+x^3+2x+8& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}2x^3-3x^2+16\end{aligned} $$ | |
| ① | Combine like terms: $$ \color{blue}{x^3} -3x^2 \, \color{red}{ -\cancel{2x}} \,+ \color{orange}{8} + \color{blue}{x^3} + \, \color{red}{ \cancel{2x}} \,+ \color{orange}{8} = \color{blue}{2x^3} -3x^2+ \color{orange}{16} $$ |
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