Final answer:
To simplify the algebraic expression 5m - 3m + 2m², combine like terms by subtracting the coefficients of 5m and -3m, resulting in 2m. The term 2m² is not a like term and so the final simplified expression is 2m + 2m².
Step-by-step explanation:
The question is related to the simplification of a polynomial expression using a variable expressions calculator. Although no calculator is used in our explanation here, to simplify 5m - 3m + 2m², you should first combine like terms, which are terms with the same variable raised to the same power. The terms 5m and -3m are like terms and can be combined by subtracting their coefficients. The resulting expression is then 2m.
Since 2m² is not a like term with 2m (because they have different exponents), it remains unchanged in the expression. Therefore, the simplified expression is 2m + 2m².
Conversion factors, dimensional analysis, and the relationship between meters (m) and centimeters (cm) are unrelated to this problem and are not considered in the simplification process. The example provided in the information about converting meters to centimeters is a description of units conversion and does not directly apply to the algebraic expression we're discussing here.