Tuesday, July 22, 2014

Use matricies to solve the system of equations (if possible). Use Gauss-Jordan elimination.

Given system of equations are ,



x - 3y = 5, -2x + 6y = -10



so the matrix A,B are as follows,


A = 1  -3


     -2   6


and B = 5


           -10



so the augmented matrix is


[AB] =  1  -3    5


          -2   6   -10


step 1 . Divide the 2nd row with -2 we get


     1  -3    5         


     1   -3   5



Both the rows are same


step 2. subtract the the 1st row from second  row and restore the 2nd row


        1  -3    5             


        0   0    0


so , now we can say that the value of "y" is any vaule and the value of "x" is dependent on "y".


i.e x = 5+3y


And so x,y are having INFINITE number of solution sets to satisfy the system of equations given.

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