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Finite Math

posted by on .

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)

  • Finite Math - ,

    I found the inverse of A to be

    5/13 3/13
    -1/13 2/13

    so
    A-1 A X = A-1</sup B

    X =

    │ 5/13 3/13││4│
    │-1/13 2/13││2│

    =
    │2│
    │0│

  • Finite Math - ,

    that doesn't look like I intended.

    let's try that again

    so
    A-1 A X = A-1 B

    X =

    │ 5/13 3/13││4│
    │-1/13 2/13││2│

    =
    │2│
    │0│

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