math problem question ?
I have no idea what I am doing. I don't even know where to start.
- PuzzlingLv 72 months ago
I suggest reading up more on matrix multiplication. The link below is really helpful and not too complicated to understand.
The important requirement when multiplying two matrices, though, is that the width (number of columns) of the first matrix must equal the height (number of rows) of the second matrix.
In your case, the first matrix (C) has 2 columns and the second matrix (E) has 3 rows. So it is not possible to multiply these two matrices.
Not possible to multiply a (3x2) matrix by a (3x3) matrix. The inner numbers (C1 and R2) must be equal in order to multiply.
Row of 1st matrix X column of 2nd Matrix
C is 3X2 --- 3rows -- 2 columns
E is 3X3 --- 3 row -- 3 columns
top row of C has 2 elements
left column of E hs 3 elements
these do not match == so you cannot multiply these matricies
= = this problem is not possible
It is not possible, because each horizontal row of C should be matched up with each vertical row of E. But 2 elements can't be matched up with 3 elements, so CE has no meaning.