Question

matrices the question is attached

Answer 1

??

Answer 2

do you recall how to add and multiply matrixes?

Answer 3

yeah

Answer 4

i have subtruct C with B then I lost :S

Answer 5

Adding matrixes is just adding component parts; like vectors right?

|4 3| + |1 5 | = |5 8| right?
|1 2| |6 6| |7 8|

Answer 6

yeah so??

Answer 7

Is X supposed to be the same for part a and part b?

Or are you to find an X matrix for each on ?

Answer 8

just trying to recall my matrix properties; if you want someone elses help; i can always leave :)

Answer 9

its X supposed to be the same for part a and part b

Answer 10

B and C look familiar; like they are .... the same somehow; cant recall how to transform B into C like that.... is it with an inverse matrix?

Answer 11

frankly dont know:S:S

Answer 12

i looked it up; its close; but no; there are different terms in C...bummer

Answer 13

If we subtract B from C we will see what AX has to look like right?

Answer 14

which is prolly what you said you did up there ;)

Answer 15

yeah wich is AX=C-B
so we multiply with the inverse of A ?

Answer 16

maybe; what is C-B; can you type it?

Answer 17

\[AX=C -B\]

Answer 18

C - B =

|-2 -4|
|-8 -1|

right?\[((-2 & -4 \ -8 & -1))\]

Answer 19

the equation editor failed on me lol

Answer 20

yeah

Answer 21

AX =

|5 3| * |a b| = |5a +3c = -2 5b +3d= -4|
|3 2| |c d| |3a +2c = -8 3b +2d= -1|

right?

Answer 22

And:

|a b| * |5 3| = |5a +b3 = -2 a3 +b2= -4|
|c d| |3 2| |c5 +d3 = -8 c3 +d2= -1|

if I did it right...

Answer 23

lets see if we can equate these things :)

5a +3c = 5a + 3b

3c - 3b = 0
----------------
5b + 3d = 3a + 2b
3b + 3d + 3a = 0
-----------------
3a + 2c = 5c + 3d
3a -3c - 3d = 0
-----------------
3b+2d = 3c + 2d
3b - 3c = 0

Answer 24

3b + 3d +3a = 3a -3c -3d
3b + 3c + 6d = 0

Answer 25

my internet source is closing; so thats as far as I can get you :/ good luck with it :) Just equate and solve for a solution to the equations and youll be fine... :)

Answer 26

thanks:)