Question

Find `3((2,5,7),(-5,6,-2),(1,8,3))-((1,3,2),(-5,-3,0),(4,4,5))`?

Answer 1

`3((2,5,7),(-5,6,-2),(1,8,3))-((1,3,2),(-5,-3,0),(4,4,5))=((5,12,19),(-10,21,-6),(-1,20,4))`

Explanation:

We have to find

`3((2,5,7),(-5,6,-2),(1,8,3))-((1,3,2),(-5,-3,0),(4,4,5))`

`3` before first element means that each element of first has to be multiplied by `3` and then respective element of second matrix to be subtracted from first i.e. answer would be

`((3xx2-1,3xx5-3,3xx7-2),(3xx(-5)-(-5),3xx6-(-3),3xx(-2)-0),(3xx1-4,3xx8-4,3xx3-5))`

= `((5,12,19),(-10,21,-6),(-1,20,4))`