Please, I need help ASAP :( Two questions:
question 1:
choices:
question 2:
choices:
1) We need to find the inverse matrix of
3 2
-1 5
This is given by
1 5 -2 = 1 5 - 2 this goes in the first answer box
__________ 1 3 ___ 1 3
3*5 - (2) (-1) 17
1 this goes in the second answer box
-23
1 5 - 2 this goes in the third answer box
_____ 1 3
17
1 5 -2 1
___ 1 3 x -23 =
17
1 5(1) + (-2)(-23)
__ 1(1) + (3)(-23)
17
1 51 this goes in the fourth answer box
___ -68
17
3 this goes in the last answer box
-4