I have a question about the bonomial theorem, and in specifically, a question that I want help on. I have worked out the answer, but by manually expanding each and every alternative. However, I thought to myself that there must be a faster way of coming to the answer. I've spent an hour or so thinking about it, but haven't thought of anything. Is there any faster method of coming to the answer of the following question? If so, please explain to me how

![enter image description here](https://i.stack.imgur.com/HTXhm.png)

Thanks!