Chelsea and Pedro manipulated the rational expression \dfrac{14k^3 + 7k^2}{7k^3 + 14k^2} 7k 3 +14k 2 14k 3 +7k 2 start fraction, 14, k, cubed, plus, 7, k, squared, divided by, 7, k, cubed, plus, 14, k, squared, end fraction. Their responses are shown below.