Homework Help: PRE CALC

Posted by gabs on Tuesday, June 7, 2011 at 10:54pm.

Use matrices to solve the system. (If the system has infinitely many solutions, express your answer in terms of c, where x = x(c), y = y(c), and z = c. If the system has no solution, enter NONE for each answer.)

5x+2y-z=2
x-2y+2z= -1
3y+z= -17

ive done tons of these but this one is giving me a bit of trouble.. please help!

PRE CALC - Reiny, Tuesday, June 7, 2011 at 11:23pm
Is your augmented matrix correct ?

5 2 -1 | 2
1 -2 2 | -1
0 3 1 | -17

I don't know which matrix method you are supposed to use.
e.g. Gauss-Jordan ? or .....

hard to line up matrices nicely on this forum.
PRE CALC - gabs, Tuesday, June 7, 2011 at 11:58pm
yes but i still dont get the answer!!!
PRE CALC - Mgraph, Wednesday, June 8, 2011 at 12:10am
x=1, y=-4, z=-5

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