Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Matrix Solution and variable multiplication

  1. Aug 24, 2010 #1
    Can we multiply a row with a variable and add it with another row while solving homogeneous system of equations as a matrix?
  2. jcsd
  3. Aug 24, 2010 #2
    It might help if you gave an example of what you want to do. But I'm pretty sure the answer is yes, if it will help you solve the system (for example if the matrix has variable entries).
  4. Aug 25, 2010 #3


    User Avatar
    Science Advisor

    What do you mean by "variable"? If you have a system of equations in x, y, z, ..., then the matrix you use to solve the system is the matrix of coefficients, all numbers. It would make no sense to multiply by x, y, z, ...- and it would not help you to reduce the matrix.

    But if you have a system of equations in x, y, z, ... where the coefficients depend on one or more parameters, they, yes, you might well want to multiply by those parameters.
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook