00:01
Okay, so we're given u and b.
00:03
And for part a, we want to find 2u, so that's going to be 2 times negative 2, comma, negative 1.
00:09
Let's bring in that 2.
00:11
So we have negative 4, comma, negative 2.
00:14
And for part b, we have 2u, which is what we have for part a.
00:18
So that's negative 4, comma, negative 2.
00:20
And then we have plus 3b, which is negative 3, comma, 2.
00:24
Let's multiply through that 3.
00:27
So we have negative 4, comma, negative 2, plus.
00:31
Plus negative 9, comma 6.
00:34
And now let's sum are horizontal and vertical components...