What is the product? Assume x 0.

$\quad\left(\sqrt{3x} + \sqrt 5\right)\left(\sqrt{15x} + 2\sqrt{30}\right)\\ = \sqrt{45x^2} + \sqrt{75x} + 2\sqrt{90x} + 2\sqrt{150}\\ =3x\sqrt5 + 5\sqrt{3x} + 6\sqrt{10x} + 10\sqrt 6$