Question
Answer
$$-\sqrt{63}-8\sqrt{7}=-11\sqrt{7}$$
Explanation
Tap the blue circles to see an explanation.
| $$ \begin{aligned}-\sqrt{63}-8\sqrt{7}& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}-3\sqrt{7}-8\sqrt{7} \xlongequal{ } \\[1 em] & \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle2}{\textcircled {2}} } }}}-11\sqrt{7}\end{aligned} $$ | |
| ① | $$ - \sqrt{63} =
- \sqrt{ 3 ^2 \cdot 7 } =
- \sqrt{ 3 ^2 } \, \sqrt{ 7 } =
- 3 \sqrt{ 7 }$$ |
| ② | Combine like terms |
This page was created using
Simplify Radical Expression