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Homework Help: Solve equation Ax = y, where A and y are known

  1. Sep 25, 2012 #1
    1. The problem statement, all variables and given/known data
    Solve for x: Ax = y.

    A = {{2 0 1},
    {1 1 4},
    {2 2 1}}

    y = {{1},

    2. Relevant equations
    Basic Matrix operations

    I have a vague idea how I'm supposed to do this, but I have no attempt yet.. eigenvalues and eigenvectors come to mind..in some way :frown:
  2. jcsd
  3. Sep 25, 2012 #2


    User Avatar
    Science Advisor
    Homework Helper
    Gold Member

    Three possibilities come to mind:
    Row reduction
    Multiply by A inverse
    Cramer's rule (determinants)

    Try what you know.
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