Well, we're gonna get a one with a probability of p. So in that case, our distance from the mean, or from the expected value, we're at one. The expected value, we already know, is equal to p. So that's, for that possible outcome, the squared distance times its probability weight. And then we have, actually let me scroll over a little bit, well I'll just do it right over here. Plus we have a probability of one minus p, one minus p for the other possible outcome. So in that outcome, we are at zero. And the difference between zero and our expected value, well that's just going to be zero minus p. And once again, we are going to square that distance. And so this is the expression, or square that quantity.