Chapter 4 - Polynomials - 4.7 Polynomials in Several Variables - 4.7 Exercise Set - Page 286: 105

$$P+2Pr+Pr^2$$

Work Step by Step

In order to find a polynomial that gives the amount after two years, we plug in 2 for t and multiply out the expression to obtain: $$P\left(1+r\right)^2 \\ P\left(r^2+2r+1\right) \\ P+2Pr+Pr^2$$

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