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Please include some steps! Thanks~  ^.^ 

 Oct 17, 2019
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For Matrix Multiplication, you have to sure the matrix sizes are compatible. This means when the dimensions (rows x columns) are put side by side, the inner numbers match. The new matrix takes the size of the outer numbers.

 

For BD, B has dimensions (2 x 2) and D has dimensions (2 x 1)

The inner numbers are (2 x 2) and (2 x 1) which means the matrix multiplication will work.

The size of the product matrix will be the outer numbers,  (2 x 2) x (2 x 1) = (2 x 1).

 

Good luck with the rest :)

 Oct 17, 2019
edited by Guest  Oct 17, 2019
edited by Guest  Oct 17, 2019

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