Question
Answer
$$7x(x^3-2x^2+5)=7x^4-14x^3+35x$$
Explanation
| $$ \begin{aligned}7x(x^3-2x^2+5)& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}7x^4-14x^3+35x\end{aligned} $$ | |
| ① | Multiply $ \color{blue}{7x} $ by $ \left( x^3-2x^2+5\right) $ $$ \color{blue}{7x} \cdot \left( x^3-2x^2+5\right) = 7x^4-14x^3+35x $$ |
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