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July 31, 2014

July 31, 2014

Posted by **Anonymous** on Monday, August 13, 2012 at 6:49am.

kx +y -z = 3

5x -ky +3z =7

For what values of k does the system have a unique solution

- math -
**drwls**, Monday, August 13, 2012 at 8:59amThe determinant

|1 5 -6|

|k 1 -1|

|5 -k 3|

must be non-zero.

Turn that into an inequality for k.

(3 -k) +(-25 -15k)+(-6k^2 +30) NOT = 0

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