Question
Answer
$$r\cdot3(r\cdot27-2r\cdot3)=63r^2$$
Explanation
Tap the blue circles to see an explanation.
| $$ \begin{aligned}r\cdot3(r\cdot27-2r\cdot3)& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}r\cdot3(27r-6r) \xlongequal{ } \\[1 em] & \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle2}{\textcircled {2}} } }}}r\cdot3\cdot21r \xlongequal{ } \\[1 em] & \xlongequal{ }63r^2\end{aligned} $$ | |
| ① | $$ 2 r \cdot 3 = 6 r $$ |
| ② | Combine like terms: $$ \color{blue}{27r} \color{blue}{-6r} = \color{blue}{21r} $$ |
This page was created using
Simplify Rational Expressions