00:00The question was the most dangerous question of 2.4 question was the question of point 5.
00:06Look, this mattress is not only equal to this, but also equal to this.
00:15How will this do it?
00:17Look at the first mattress.
00:19This is the original question.
00:21Now, A, B, C, plus AB, plus B, C.
00:25We have to do something we need to do.
00:26First, A is common.
00:31First, from R1.
00:35Now, R1 is common.
00:37You can divide everything like this.
00:391 plus A, B, B and B.
00:42This means B is common from R2.
00:451 is B, B is B, B is B, B is B, B is B, B is B.
00:50Then, third, from A, C, 1 upon C, 1 upon C plus A.
00:55Now, look, A, B, C should be able to do it.
00:57When we take common, we need to keep it in one position.
01:00That all things are hazardous.
01:09Now, I have to do the next job.
01:12What did I do?
01:13What did I do?
01:14Look at this.
01:16Here, A upon A, so A upon A should be able to do it.
01:20B upon B should be able to do it.
01:21And C upon C should be able to do it.
01:23Now, look.
01:24R2 and R3 will be able to do it in one position.
01:26This is the second row.
01:28Okay?
01:30And third row.
01:31So, one upon B and one upon C should be able to do it.
01:35Then, look.
01:35One upon B plus one and one upon C should be able to do it.
01:39Why did this mean?
01:41Because, again, this first row is similar.
01:43Second row, third row could not be able to do it.
01:45Now, let us see what is common.
01:47This one upon A plus one upon B plus one upon C plus one.
01:51This common is there.
01:52And here.
01:52And again, the one-one is not possible.
01:54Because, now, there are many common habits to do it.
01:57Here has to be able to do the first row.
01:59The first row of row has been able to do it.
02:02Now, I went and it's in my view.
02:04can be done then we will do it again
02:07this is a little difficult question
02:09and see what we have done
02:20r2 minus r1
02:23r3 minus r1
02:24second row
02:25first row minus
02:27and third row
02:28why do we do this
02:30this is 0 0
02:331 upon b minus 1 upon b cancel
02:351 upon b minus 1 upon b
02:371 upon b minus 1 upon b
02:381 upon c minus 1 upon c
02:40now just open
02:42open
02:43first row
02:44just open
02:46this multiplication
02:47so
02:49one thing
02:50proved
02:50this was
02:51this was
02:51this was
02:52this was
02:52this
02:551 upon a
02:59here
03:00one upon b
03:00one upon c
03:01here
03:02here
03:03a
03:03foreign
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