What is the Correct Combination of A's and B's for 2x2 Matrix Multiplication?

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Homework Help Overview

The discussion revolves around matrix multiplication, specifically the combination of elements in 2x2 matrices represented by variables a, b, c, and d. The original poster expresses confusion regarding the correct method to multiply these matrices and seeks clarification on the appropriate combinations of these variables.

Discussion Character

  • Exploratory, Assumption checking

Approaches and Questions Raised

  • The original poster attempts to articulate their understanding of matrix multiplication but struggles with the notation and formulation of their question. Some participants question the clarity of the problem statement and suggest that it needs to be more precise to facilitate helpful responses.

Discussion Status

There is ongoing dialogue about how to properly format the question and represent the matrices involved. Some participants have offered guidance on using LaTeX for clearer communication of mathematical expressions, indicating a productive direction in the discussion.

Contextual Notes

The original poster mentions a composite linear transformation, which may imply additional complexity in their question. There is also a note about difficulties in using the correct symbols, suggesting a potential barrier to effective communication of the problem.

morbello
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wow what a day.ive got an a,b,c,d matrix mulitiplyed by an a,b,c,d.matrix and i want to know what combination off a's and b's gives the answer to the 2*2 * 2*2 question.

ive read its a1 *a2 b1*b2 c1*c2 d1*d2 is this right as when I've done it i have got a sum that is wrong.



The Attempt at a Solution



 
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sorry its a composit linear transformation I am looking for.
 
When you submit a question it should follow this format:

Homework Statement


What exactly is the problem you're trying to solve? Saying that you have "an a,b,c,d matrix mulitiplyed by an a,b,c,d.matrix and i want to know what combination off a's and b's gives the answer to the 2*2 * 2*2 question" is not a problem statement that anyone can do anything helpful with.

Homework Equations



The Attempt at a Solution


Show us what you have tried to do.
 
ok sorry I am not sure how to get the symbols on the screen will try again tommorow.
 
Try these. Click on either one to see the LaTeX script I used. You can copy and paste the script into your post.

\left[ <br /> \begin{array}{c c}<br /> a_1 &amp; b_1 \\<br /> c_1 &amp; d_1<br /> \end{array}\right ]

Here's another.

\left[ <br /> \begin{array}{c c}<br /> a_2 &amp; b_2 \\<br /> c_2 &amp; d_2<br /> \end{array}\right ]
 

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