Answer
$$3x^4(5x^2+3x-2)=15x^6+9x^5-6x^4$$
Explanation
| $$ \begin{aligned}3x^4(5x^2+3x-2)& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}15x^6+9x^5-6x^4\end{aligned} $$ | |
| ① | Multiply $ \color{blue}{3x^4} $ by $ \left( 5x^2+3x-2\right) $ $$ \color{blue}{3x^4} \cdot \left( 5x^2+3x-2\right) = 15x^6+9x^5-6x^4 $$ |
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