00:01
Hi, today we are solving the question in which we are given with a is equal to 1 -0 -11, b is equals to a -b -c -d.
00:11
So we are given with two matrices and here we are given that ab is equal to b.
00:19
So given condition is this.
00:21
Now on multiplying a, b, we get a plus c, b plus d, c and d.
00:41
We got on multiplication.
00:45
Now on multiplying b, we get the matrix as a c, a plus b and c plus d.
00:55
Now to make it equal, we use some conditions.
01:00
When we use the given condition d is equal to zero so the matrix will like a plus c b plus zero c zero similarly b a will be like a c c so so, d is equal to 0 is the necessary condition.
01:37
Now, putting c is equal to 0, we get a plus 0, b plus 0.
01:45
That is b, 0 and 0...