Answer: 2x^2 - 18
BTW: the "•" stands for multiply! and the explanations say what you have to do to get there not the next step.
Steps:
(x-3)(2x+6) Set up for solving
x•2x + 6x - 3•2x - 3•6 Use Foil to multiply
2x^2 + 6x - 6x -18 Calculate the product
2x^2 - 18