Question
Answer
$$3z(12z+y)=3yz+36z^2$$
Explanation
Tap the blue circles to see an explanation.
| $$ \begin{aligned}3z(12z+y)& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}36z^2+3yz \xlongequal{ } \\[1 em] & \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle2}{\textcircled {2}} } }}}3yz+36z^2\end{aligned} $$ | |
| ① | Multiply $ \color{blue}{3z} $ by $ \left( 12z+y\right) $ $$ \color{blue}{3z} \cdot \left( 12z+y\right) = 36z^2+3yz $$ |
| ② | Combine like terms: $$ 3yz+36z^2 = 3yz+36z^2 $$ |
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