00:01
All right, so in this problem, what we have to do is we're giving these two terms, 9k plus q, 2k minus q, and we just need to multiply and distribute and expand this equation here.
00:12
And we use foil to do that.
00:15
And remember, foil stands for first, outside, inside, last.
00:21
And that's just pretty much the order of operations i'm going to be doing here.
00:26
So first we have the 9k and 2k, and let's multiply that together, which will give us 18 k squared.
00:36
And now we're going to go to the outside, which would be the 9k times q...