How Do You Solve Matrix Equations with a Calculator?

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SUMMARY

The discussion focuses on solving matrix equations using a calculator, specifically addressing the process of isolating matrix C in a 3x3 format. Participants confirm that subtracting the first matrix from the other side and multiplying by the inverse of the second matrix is a valid approach. They emphasize the importance of verifying the solution by substituting it back into the original equation to ensure accuracy. The consensus is that C must be a 3x3 matrix, although the possibility of it being a scalar is also acknowledged.

PREREQUISITES
  • Understanding of matrix operations, including addition, subtraction, and multiplication.
  • Familiarity with calculating the inverse of a matrix.
  • Proficiency in using a scientific or graphing calculator for matrix computations.
  • Basic knowledge of linear algebra concepts, particularly matrix equations.
NEXT STEPS
  • Learn how to calculate the inverse of a matrix using a calculator.
  • Study the properties of 3x3 matrices and their applications in solving equations.
  • Explore methods for verifying solutions in matrix equations through substitution.
  • Investigate advanced matrix operations, such as determinants and eigenvalues.
USEFUL FOR

Students studying linear algebra, educators teaching matrix operations, and anyone looking to enhance their skills in solving matrix equations using calculators.

KF33
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Homework Statement


upload_2018-6-4_10-18-44.png


Homework Equations

The Attempt at a Solution


I know I would have to do something with my calculator and I tried to solve like solving an equation for C, but not sure. I put all the matrices in my calculator. I then subtracted the first matrix to the other side then multiplied by the inverse of the second. That got my out a 3x3 matrix, but not sure if that means that is the solution.
 

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From the looks of it, ## C ## must be a 3x3 matrix.
 
KF33 said:

Homework Statement


View attachment 226616

Homework Equations

The Attempt at a Solution


I know I would have to do something with my calculator and I tried to solve like solving an equation for C, but not sure. I put all the matrices in my calculator. I then subtracted the first matrix to the other side then multiplied by the inverse of the second. That got my out a 3x3 matrix, but not sure if that means that is the solution.
That sounds like the correct thing to do. If you are unsure, put your answer in and see if it works.
 
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LCKurtz said:
If you are unsure, put your answer in and see if it works.
Substituting your answer in the original equation is a good idea in any case. As you progress in mathematics, some of the calculations get very involved, and there are lots opportunities to make small errors. Once you reach a solution, you can confirm that your answer is correct by substituting it in the problem. If you end up with two equal expressions, that's a strong indication that your solution is correct.
 
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Charles Link said:
From the looks of it, ## C ## must be a 3x3 matrix.
Either it's a 3x3 matrix or a scalar. It should be easy to verify whether or not a scalar could be a possible solution.
 

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