First, start by using the square roots. The square root of x^2 is x, and the square root of x^5 is x^2.5. Then , multiply by adding the exponents, so x * x^2.5 is x^(2.5+1), since x can also be written as x^1. Lastly, simplify by adding 2.5 and 1 and get x^3.5
