Answer
$$x^2+\sqrt{5}x-3x-3\sqrt{5}$$
Work Step by Step
Expanding the equations by multiplying each term in parenthesis by each of the other terms in the other set of parenthesis, we find:
$$xx+\sqrt{5}x-3x-3\sqrt{5}\\ x^2+\sqrt{5}x-3x-3\sqrt{5}$$