Question
Answer
$$(-5i)(-4x)^3=320ix^3$$
Explanation
| $$ \begin{aligned}(-5i)(-4x)^3& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}(-5i)\cdot-64x^3 \xlongequal{ } \\[1 em] & \xlongequal{ }320ix^3\end{aligned} $$ | |
| ① | $$ \left( -4x \right)^3 = (-4)^3x^3 = -64x^3 $$ |
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