Question
Answer
$$-6g\cdot2h+gh\cdot2-3hg\cdot2+4h\cdot2g=-8gh$$
Explanation
Tap the blue circles to see an explanation.
| $$ \begin{aligned}-6g\cdot2h+gh\cdot2-3hg\cdot2+4h\cdot2g& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} \htmlClass{explanationCircle explanationCircle2}{\textcircled {2}} \htmlClass{explanationCircle explanationCircle3}{\textcircled {3}} } }}}-12gh+2gh-6gh+8gh \xlongequal{ } \\[1 em] & \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle4}{\textcircled {4}} } }}}-8gh\end{aligned} $$ | |
| ① | $$ 6 g \cdot 2 h = 12 g h $$ |
| ② | $$ 3 h g \cdot 2 = 6 g h $$ |
| ③ | $$ 4 h \cdot 2 g = 8 g h $$ |
| ④ | Combine like terms: $$ \color{blue}{-12gh} + \color{red}{2gh} \color{green}{-6gh} + \color{green}{8gh} = \color{green}{-8gh} $$ |
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