0:00
Hello everyone.
00:01
So in this question, a is equal to matrix 1 minus 2, 1, 0, 2 minus 8, minus 4, 5, 9.
00:13
And b is equal to 08 minus 9 and capital x is equal to x, y, z.
00:22
Okay? now, date of a is equal to 1 multiplied with 18 plus 4.
00:30
40 plus 2 0 minus 32 plus 1 0 plus 8 which is equal to 2.
00:38
Now a11 is equal to minus 1 to the power 1 plus 1 date of.
00:46
So we have first row first column.
00:47
So this is first row and this is first column.
00:53
Now we will cancel out this first row first column.
00:58
Then we will get only 2 minus 8 5, 9.
01:02
So here 2 minus 8 5 9 and the value of this is equal to 18 plus 40 which is equal to 58.
01:13
Okay now in same process a12 is equal to minus 1 to the power 1 plus 2 date 0 minus 8 minus 4 9 and this equal to minus 0 minus 32 which is equal to 32.
01:33
Okay, then similarly we will get a13 is equal to 8, a21 is equal to 23, a22 is equal to 13, a23 a23 is equal to 3, a31 is equal to 14, a322 is equal to 8, a333 is equal to 2...