Question

What am I doing wrong? (matrix question)

Answer 1

I 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?

Answer 2

Do I just subtract the 2 matrices from each other instead?

Answer 3

Did you define a and b?

Answer 4

Yes, a and b were already defined

Answer 5

What is the error message?

Answer 6

Just says error data type,
1.quit
2. go to

Answer 7

matrix X is undefined, right ?

I would try: enter matrix A and matrix B
find B-A
divide that by 4
that should give you X

Answer 8

If these are small matrices, (if all else fails) you can do this by hand

B-A means subtract corresponding elements

Answer 9

I got this from subtracting b & a,
[5 3]
[4 -6]
[-5 0]

& then I tried to divide that by 4 & it says error

Answer 10

I 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...

Answer 11

Im using an ti-84 plus if that helps...
It usually solves my problems, I don't understand why the error message keeps popping up

Answer 12

But I got my answer, thank you for help once again.!

Answer 13

I 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)

Answer 14

Yes, multiplying it by 0.25 worked.
Just the 4 by itself didnt

Answer 15

go figure..

Answer 16

Odd