Math Is Fun Forum

EPhillips1989

Member

Registered: 2007-11-03

Posts: 29

reduced echelon form

i have this system of equations where the augmented matrix is

(a-9)   4           1        0
-20     (a+9)     3        0
24       -12       (a-6)   0

can anyone help me put this in reduced echelon form??
i dont know what to do to the matrix to get a 1 in the leading row! please help!!!

mikau

Member

Registered: 2005-08-22

Posts: 1,504

Re: reduced echelon form

this takes time but you can do it. What you can do first is you can divide the top row by (a-9), the first element in the first row will therefore become (a-9)/(a-9) which is 1.

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A logarithm is just a misspelled algorithm.

EPhillips1989

Member

Registered: 2007-11-03

Posts: 29

Re: reduced echelon form

ive got it this far but now am struggling to complete row echelon form is this correct so far anyone??

1   4/(a-9)           1/(a-9)
0   a^2-12a+11   a^2-12a+23
0   12a-204         a^2-15a+30

please help!!!