00:01
In this problem, they are giving you f of x and g of x, and they want you to find f times g of x.
00:07
So you just need to simply multiply your two binomials together.
00:15
And to do that, you can just foil together.
00:21
So do your first two.
00:22
So 7 times 7 would be 49.
00:25
X times x is x squared.
00:28
And you're outside two.
00:30
So 8 times 7x, 8 times 7 is 56.
00:34
X, then do your inside 2.
00:42
So that would be minus 56x because minus 8 times 7 is a negative 56, and then do your last 2.
00:50
So negative 8 times 8 would be negative 64.
00:56
56 minus 56 would be 0, so you're going to end up with 49x squared minus 64.
01:08
Then in part b, they want you to do, oh sorry, this was a.
01:12
I don't know why, but b.
01:16
I guess i was getting in a hurry to work through the problem...