When are our two functions equal to each other? Which is equivalent to, if we just subtract x from both sides, we get, when does x squared minus 3x equal 0? We can factor out an x on the right-hand side. So this is going to be, when does x times x minus 3 equal 0? Well, if the product is equal to 0, at least one of these need to be equal to 0. So x could be equal to 0, or x minus 3 is equal to 0. So x is equal to 0, or x is equal to 3.