Answer
$$(h+2)(h+2)=h^2+4h+4$$
Explanation
Tap the blue circles to see an explanation.
| $$ \begin{aligned}(h+2)(h+2)& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}h^2+2h+2h+4 \xlongequal{ } \\[1 em] & \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle2}{\textcircled {2}} } }}}h^2+4h+4\end{aligned} $$ | |
| ① | Multiply each term of $ \left( \color{blue}{h+2}\right) $ by each term in $ \left( h+2\right) $. $$ \left( \color{blue}{h+2}\right) \cdot \left( h+2\right) = h^2+2h+2h+4 $$ |
| ② | Combine like terms: $$ h^2+ \color{blue}{2h} + \color{blue}{2h} +4 = h^2+ \color{blue}{4h} +4 $$ |
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