Math Question
![Prove: The square of a number that is one more than a multiple of 3 is also one more than a multiple of \( 3 . \)
\[
\begin{aligned}
(3 n+1)^{2} &=[?] n^{2}+[] n+[] \\
&=[]\left([] n^{2}+[] n\right)+[] \\
&=1 \text { more than a multiple of } 3
\end{aligned}
\]](https://d3hlidq5bf9vg0.cloudfront.net/app-server-student/2022/3/14/7bfbf470-33c6-4ba8-bb15-6689149873f7.png "Prove: The square of a number that is one more than a multiple of 3 is also one more than a multiple of \( 3 . \)
\[
\begin{aligned}
(3 n+1)^{2} &=[?] n^{2}+[] n+[] \\
&=[]\left([] n^{2}+[] n\right)+[] \\
&=1 \text { more than a multiple of } 3
\end{aligned}
\]")
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