Question
Solve the matrix equation AX =B for X using:
A= [ 2 -3] B= [4 ]
[ 1 5] [2 ]
(theres a blank space between the 4 and the 2)
Answers
Reiny
I found the inverse of A to be
5/13 3/13
-1/13 2/13
so
A<sup>-1</sup> A X = A<sup>-1</sup B
X =
│ 5/13 3/13││4│
│-1/13 2/13││2│
=
│2│
│0│
5/13 3/13
-1/13 2/13
so
A<sup>-1</sup> A X = A<sup>-1</sup B
X =
│ 5/13 3/13││4│
│-1/13 2/13││2│
=
│2│
│0│
Reiny
that doesn't look like I intended.
let's try that again
so
A<sup>-1</sup> A X = A<sup>-1</sup> B
X =
│ 5/13 3/13││4│
│-1/13 2/13││2│
=
│2│
│0│
let's try that again
so
A<sup>-1</sup> A X = A<sup>-1</sup> B
X =
│ 5/13 3/13││4│
│-1/13 2/13││2│
=
│2│
│0│