1. Not finding help here? Sign up for a free 30min tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Linear Algebra Question

  1. Feb 9, 2008 #1
    Linear Algebra Question....

    So, the professor assigned this problem even though the book never touches on it whatsoever. I have no clud how to do it, so I would appreciate if anyone can describe the process of demonstrate.

    Q. Find the polynomial of degree 2 whose graph goes through points (1,-1), (2,3), and (3,13).

    Thank you for the help!
     
  2. jcsd
  3. Feb 9, 2008 #2

    Dick

    User Avatar
    Science Advisor
    Homework Helper

    A polynomial of degree 2 is a*x^2+b*x+c=y. Substitute your three points and you get three linear equation in the variables a,b,c. Solve the system.
     
  4. Feb 9, 2008 #3
    See the section where it talks about AX = 0, and about homogeneous trivial solutions (or non-trivial).
    I strongly think that it would have something about this question in that section.
     
  5. Feb 9, 2008 #4
    Dick, I think you got it...I will try it.

    Should I solve for it by making it in rref ?
     
    Last edited: Feb 9, 2008
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?



Similar Discussions: Linear Algebra Question
Loading...