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gjhfdfg
 2 years ago
What am I doing wrong? (matrix question)
gjhfdfg
 2 years ago
What am I doing wrong? (matrix question)

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gjhfdfg
 2 years ago
Best ResponseYou've already chosen the best response.0I have a matrix problem where I solve for X, the problem is 4X + A = B. I plugged my matrices into my calculator & typed 4x + a then pressed enter. Then it said error? Am I not doing this problem correctly?

gjhfdfg
 2 years ago
Best ResponseYou've already chosen the best response.0Do I just subtract the 2 matrices from each other instead?

tyteen4a03
 2 years ago
Best ResponseYou've already chosen the best response.0Did you define a and b?

gjhfdfg
 2 years ago
Best ResponseYou've already chosen the best response.0Yes, a and b were already defined

tyteen4a03
 2 years ago
Best ResponseYou've already chosen the best response.0What is the error message?

gjhfdfg
 2 years ago
Best ResponseYou've already chosen the best response.0Just says error data type, 1.quit 2. go to

phi
 2 years ago
Best ResponseYou've already chosen the best response.1matrix X is undefined, right ? I would try: enter matrix A and matrix B find BA divide that by 4 that should give you X

phi
 2 years ago
Best ResponseYou've already chosen the best response.1If these are small matrices, (if all else fails) you can do this by hand BA means subtract corresponding elements

gjhfdfg
 2 years ago
Best ResponseYou've already chosen the best response.0I got this from subtracting b & a, [5 3] [4 6] [5 0] & then I tried to divide that by 4 & it says error

phi
 2 years ago
Best ResponseYou've already chosen the best response.1I don't know how your calculator works with matrices, but dividing a matrix by 4 means divide each of its elements by 4 (or multiply by 0.25) the first row would be 5/4 3/4 and so on...

gjhfdfg
 2 years ago
Best ResponseYou've already chosen the best response.0Im using an ti84 plus if that helps... It usually solves my problems, I don't understand why the error message keeps popping up

gjhfdfg
 2 years ago
Best ResponseYou've already chosen the best response.0But I got my answer, thank you for help once again.!

phi
 2 years ago
Best ResponseYou've already chosen the best response.1I just looked at the manual, and it should work. It does want the 4 to be a value (not a matrix) did you try multiplying by 0.25 (just an experiment)

gjhfdfg
 2 years ago
Best ResponseYou've already chosen the best response.0Yes, multiplying it by 0.25 worked. Just the 4 by itself didnt
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