Integrate x+1/sqrt(x). i know that the answer is 2/3 • sqrt(x) • (x+3) + c, but i don't know how it is simplified from 2/3 • x^3/2 + 2 • x^1/2 + c. explain this step in detail? you!

Someone answer this asap for the length, in feet, of a rectangular rug is represented by the expression 5x² + 2x. the width, in feet, is represented by the expression 3x². which expression represents the perimeter, in feet, of the rug? a. 8x² + 2x b. 8x² + 4x c. 16x² + 2x d. 16x² + 4x