Answer
$$(w+5)(w+5)=w^2+10w+25$$
Explanation
Tap the blue circles to see an explanation.
| $$ \begin{aligned}(w+5)(w+5)& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}w^2+5w+5w+25 \xlongequal{ } \\[1 em] & \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle2}{\textcircled {2}} } }}}w^2+10w+25\end{aligned} $$ | |
| ① | Multiply each term of $ \left( \color{blue}{w+5}\right) $ by each term in $ \left( w+5\right) $. $$ \left( \color{blue}{w+5}\right) \cdot \left( w+5\right) = w^2+5w+5w+25 $$ |
| ② | Combine like terms: $$ w^2+ \color{blue}{5w} + \color{blue}{5w} +25 = w^2+ \color{blue}{10w} +25 $$ |
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