I am to solve the linear system using an inverse matrix. The problem is:
. . .5x + 6y = 14
. . .4x - . .y = 17
The determinant would be:
. . .| 5. ..6 |
. . .| 4. .-1 |
This would then be 1 / (-5 - 24) = 1 / (-29). Then the inverse would be:
. . .-1. ..-6. . .[ 14 ]
. . .-4. . .5. .. [. .7 ]
I used the calculator and got:
. . .[ -51 ]
. . .[ -21 ]
But this doesn't look right!
_________________________________
Edited by stapel -- Reason for edit: restoring formatting
. . .5x + 6y = 14
. . .4x - . .y = 17
The determinant would be:
. . .| 5. ..6 |
. . .| 4. .-1 |
This would then be 1 / (-5 - 24) = 1 / (-29). Then the inverse would be:
. . .-1. ..-6. . .[ 14 ]
. . .-4. . .5. .. [. .7 ]
I used the calculator and got:
. . .[ -51 ]
. . .[ -21 ]
But this doesn't look right!
_________________________________
Edited by stapel -- Reason for edit: restoring formatting