Question
Answer
$$-5c(2c-5)=-10c^2+25c$$
Explanation
Tap the blue circles to see an explanation.
| $$ \begin{aligned}-5c(2c-5)& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}-(10c^2-25c) \xlongequal{ } \\[1 em] & \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle2}{\textcircled {2}} } }}}-10c^2+25c\end{aligned} $$ | |
| ① | Multiply $ \color{blue}{5c} $ by $ \left( 2c-5\right) $ $$ \color{blue}{5c} \cdot \left( 2c-5\right) = 10c^2-25c $$ |
| ② | Remove the parentheses by changing the sign of each term within them. $$ - \left(10c^2-25c \right) = -10c^2+25c $$ |
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