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. And so this is the expression for the variance of y, and we can simplify it a little bit. So this is all going to be equal to, so let me just, p times one minus p squared. And then this is just going to be p squared times one minus p, plus p squared times one minus p. And let's see, we can factor out a p times one minus p. So what is that going to be left with?