Question

How do you multiply three matrices given ⎛⎜⎝−14−20331−4052−1⎞⎟⎠ and ⎛⎜ ⎜ ⎜⎝125−34023−4−122⎞⎟ ⎟ ⎟⎠ and ⎛⎜⎝−243⎞⎟⎠?

Answer 1

multiply first column by first first row.

and add