WEBVTT
1
00:00:01.139 --> 00:00:04.049 A:middle L:90%
Hello. Welcome to this person. And this lesson
2
00:00:04.839 --> 00:00:11.259 A:middle L:90%
we'll find an underwater. That is the passes through
3
00:00:11.259 --> 00:00:15.769 A:middle L:90%
the point p ko out and it's going out to
4
00:00:15.779 --> 00:00:26.449 A:middle L:90%
the plane. Good. So that is the victim
5
00:00:26.839 --> 00:00:31.949 A:middle L:90%
, p k l across the victor p R.
6
00:00:33.439 --> 00:00:37.320 A:middle L:90%
Right. So the first one is this. We'll
7
00:00:37.320 --> 00:00:44.280 A:middle L:90%
need the PQ that is sick or two. So
8
00:00:44.280 --> 00:00:59.780 A:middle L:90%
negative two mhm negative. Two minus one F one
9
00:00:59.780 --> 00:01:07.109 A:middle L:90%
minus zero. Then we have 30 minus one.
10
00:01:07.120 --> 00:01:14.540 A:middle L:90%
Okay, so that as the victor, they get
11
00:01:14.540 --> 00:01:26.540 A:middle L:90%
to three. I last j then plus two K
12
00:01:26.739 --> 00:01:32.909 A:middle L:90%
. We equally need Director P. R. So
13
00:01:32.909 --> 00:01:41.159 A:middle L:90%
that is four minus one. Yeah, two minus
14
00:01:41.159 --> 00:01:47.760 A:middle L:90%
arrow than five minus one. So that is the
15
00:01:47.760 --> 00:01:55.640 A:middle L:90%
victor today. I lost two j. Yeah,
16
00:01:56.540 --> 00:02:05.200 A:middle L:90%
last four K. Yeah. So means that the
17
00:02:05.209 --> 00:02:13.819 A:middle L:90%
p kill cross p. L would become the determinant
18
00:02:13.830 --> 00:02:22.169 A:middle L:90%
maitresse with columns for the increase of Victor. Peaky
19
00:02:22.169 --> 00:02:28.710 A:middle L:90%
O negative three woman two. And for that of
20
00:02:28.710 --> 00:02:31.830 A:middle L:90%
the p r, we have three, two and
21
00:02:31.830 --> 00:02:45.360 A:middle L:90%
four. Okay, Mhm. Uh huh, Yeah
22
00:02:45.840 --> 00:02:52.189 A:middle L:90%
. Mhm. So let's expand that Using the cough
23
00:02:52.199 --> 00:02:55.250 A:middle L:90%
, the bottom metal. So the I've but we
24
00:02:55.250 --> 00:03:06.090 A:middle L:90%
delete this thing of 12 24 Yeah, minus G
25
00:03:06.840 --> 00:03:13.129 A:middle L:90%
So the minus j wittily the first rule. The
26
00:03:13.129 --> 00:03:17.479 A:middle L:90%
second column so that we have negative story 32 and
27
00:03:17.479 --> 00:03:23.860 A:middle L:90%
four. For the cave back, we delete the
28
00:03:23.860 --> 00:03:28.439 A:middle L:90%
first rule in the last Colombia third column. So
29
00:03:28.439 --> 00:03:36.139 A:middle L:90%
we have negative 33 one and two. So this
30
00:03:36.139 --> 00:03:45.960 A:middle L:90%
becomes four times one minus two times two the minus
31
00:03:45.960 --> 00:03:50.990 A:middle L:90%
Jerry of negative. Three times four minus, three
32
00:03:51.000 --> 00:03:54.139 A:middle L:90%
times two. Then they give bad. Yeah,
33
00:03:54.150 --> 00:03:59.949 A:middle L:90%
negative. 38 times two minus three times one.
34
00:03:59.949 --> 00:04:05.159 A:middle L:90%
So that is three. So this is zero I
35
00:04:05.939 --> 00:04:15.949 A:middle L:90%
minus so 12. Negative tool. Yeah. Mhm
36
00:04:16.540 --> 00:04:25.569 A:middle L:90%
minus six. That is negative. 18. So
37
00:04:25.569 --> 00:04:30.959 A:middle L:90%
negative. 18 plus 18 minutes. Negative. 18
38
00:04:30.970 --> 00:04:34.579 A:middle L:90%
times negative. That is positive. 18. And
39
00:04:34.579 --> 00:04:43.509 A:middle L:90%
here you have negative six minus three. That is
40
00:04:43.519 --> 00:04:53.680 A:middle L:90%
negative. Nine key. Okay. Yeah. So
41
00:04:53.680 --> 00:04:57.949 A:middle L:90%
we have the victor. That is also go now
42
00:04:57.959 --> 00:05:02.449 A:middle L:90%
to the plane. As p, uh, course
43
00:05:04.240 --> 00:05:11.519 A:middle L:90%
kill. That is the call to 18 J minus
44
00:05:11.519 --> 00:05:19.560 A:middle L:90%
nine key or the negative of it. Yeah,
45
00:05:20.040 --> 00:05:29.250 A:middle L:90%
So it can call a B PQ Cross p.
46
00:05:29.839 --> 00:05:32.600 A:middle L:90%
Oh, that is he called to I get to
47
00:05:32.610 --> 00:05:42.759 A:middle L:90%
18 g plus. Yeah, last and nine k
48
00:05:43.240 --> 00:05:46.050 A:middle L:90%
. Okay, then the next question is to the
49
00:05:46.060 --> 00:05:49.170 A:middle L:90%
keypad is to look for the triangle. The area
50
00:05:49.170 --> 00:05:57.550 A:middle L:90%
of a triangle P Oh, two mhm more.
51
00:05:59.439 --> 00:06:09.790 A:middle L:90%
Okay, so area mhm of the strangle is recalled
52
00:06:09.790 --> 00:06:15.009 A:middle L:90%
to half of the magnitude of this vector that we
53
00:06:15.009 --> 00:06:20.500 A:middle L:90%
just found. Mm. Okay, so we have
54
00:06:20.509 --> 00:06:31.920 A:middle L:90%
squared off 18 squared glass, nine squared. Okay
55
00:06:31.930 --> 00:06:36.449 A:middle L:90%
, All over to mhm. So this gives.
56
00:06:46.439 --> 00:06:56.959 A:middle L:90%
Yeah. So 18 square gives three, 24 then
57
00:06:56.970 --> 00:07:00.660 A:middle L:90%
nine squared. Gives 81 so that the spirit of
58
00:07:02.139 --> 00:07:13.370 A:middle L:90%
mhm Yeah. Yeah, very. Uh, 34
59
00:07:13.379 --> 00:07:23.149 A:middle L:90%
to us each. 14 that is 405 What?
60
00:07:25.439 --> 00:07:35.430 A:middle L:90%
Uh huh. Okay. 4 35 or their five
61
00:07:35.439 --> 00:07:43.250 A:middle L:90%
divided by one. Okay, so actually turns out
62
00:07:43.250 --> 00:07:49.560 A:middle L:90%
that you can have 81 times five in this 1722
63
00:07:50.439 --> 00:07:55.170 A:middle L:90%
So that you have screwed of 81. Spirit of
64
00:07:55.180 --> 00:08:01.300 A:middle L:90%
five. And there is nine. Spirit of five
65
00:08:01.310 --> 00:08:07.029 A:middle L:90%
on two. So this is the area. The
66
00:08:07.040 --> 00:08:13.850 A:middle L:90%
area? Yeah. Paul, for the triangle.
67
00:08:13.860 --> 00:08:20.589 A:middle L:90%
P. Yeah. Kill. Wow. Okay,
68
00:08:20.600 --> 00:08:22.250 A:middle L:90%
Potential time. This is the end of the lesson
69
--> A:middle L:90%
.