8k ^ 3 + 26k ^ 2 + 6k For this case, the first thing you should do is rewrite the expression. We have then: Step 1: Take out common factor. 8k ^ 3 + 26k ^ 2 + 6k 2k * (4k ^ 2 + 13k + 3) Step 2: Factor quadratic expression. 2k * (4k ^ 2 + 13k + 3) 2k * (4k + 1) * (k + 3) Answer: to find linear expressions for the possible dimensions of a rectangular we rewrite the expression: 2k * (4k + 1) * (k + 3)