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February 28, 2015

Posted by **Anonymous** on Sunday, November 13, 2011 at 3:40pm.

4x-y+z= -5

2x+2y+3z=10

5x-2y+6z=1

- precal -
**Damon**, Sunday, November 13, 2011 at 4:55pm - precal -
**Damon**, Sunday, November 13, 2011 at 5:01pmfirst determinant calculator

http://www.wolframalpha.com/widgets/view.jsp?id=7fcb0a2c0f0f41d9f4454ac2d8ed7ad6

+4 -1 +1

+2 +2 +3

+5 -2 +6

determinant = D = 55

- precal -
**Damon**, Sunday, November 13, 2011 at 5:07pmNow for x put right side in x column

+5 -1 +1

10 +2 +3

+1 -2 +6

determinant = Dx = 125

x = 125/55

You go ahead and do y and z

- precal -
**Damon**, Sunday, November 13, 2011 at 5:18pmUtube on how to find determinant of 3x3

http://www.youtube.com/watch?v=ROFcVgehEYA&feature=related

- whoops typo -
**Damon**, Sunday, November 13, 2011 at 5:24pmNow for x put right side in x column

-5 -1 +1 nope negative 5

10 +2 +3

+1 -2 +6

determinant = Dx = -55

x = -55/55

x = -1

You go ahead and do y and z

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