$$ \begin{aligned}x^3(2x^2+3x)& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}2x^5+3x^4\end{aligned} $$ | |
① | Multiply $ \color{blue}{x^3} $ by $ \left( 2x^2+3x\right) $ $$ \color{blue}{x^3} \cdot \left( 2x^2+3x\right) = 2x^5+3x^4 $$ |