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How to work the problems and explain step by step by showing the work

How to work the problems and explain step by step by showing the work-example-1

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well, you're asked to simply grab the second version of that amount, or balance, and provide a common factored version of it, is all

so
\bf A_2=(P+Pr)+(P+Pr)r \\\\ \textit{now, let's take common factor} \\\\ A_2=\underline{(P+Pr)}+\underline{(P+Pr)} r\impliedby \textit{see the common factor?} \\\\ A_2=\underline{(P+Pr)}(1+r)
User Alex Howansky
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