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

[morbello]

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

 

[morbello]

sorry its a composit linear transformation I am looking for.

 

[Mark44]

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.

 

[morbello]

ok sorry I am not sure how to get the symbols on the screen will try again tommorow.

 

[Mark44]

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 ]