Answer
$$x^2(3x^2+5x+10)=3x^4+5x^3+10x^2$$
Explanation
| $$ \begin{aligned}x^2(3x^2+5x+10)& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}3x^4+5x^3+10x^2\end{aligned} $$ | |
| ① | Multiply $ \color{blue}{x^2} $ by $ \left( 3x^2+5x+10\right) $ $$ \color{blue}{x^2} \cdot \left( 3x^2+5x+10\right) = 3x^4+5x^3+10x^2 $$ |
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