Question
Answer
$$x\cdot3(-3x+18)=-9x^2+54x$$
Explanation
Tap the blue circles to see an explanation.
| $$ \begin{aligned}x\cdot3(-3x+18)& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}x(-9x+54) \xlongequal{ } \\[1 em] & \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle2}{\textcircled {2}} } }}}-9x^2+54x\end{aligned} $$ | |
| ① | Multiply $ \color{blue}{3} $ by $ \left( -3x+18\right) $ $$ \color{blue}{3} \cdot \left( -3x+18\right) = -9x+54 $$ |
| ② | Multiply $ \color{blue}{x} $ by $ \left( -9x+54\right) $ $$ \color{blue}{x} \cdot \left( -9x+54\right) = -9x^2+54x $$ |
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