- #1
smashbrohamme
- 97
- 1
Using cramers rule.
the equation is.
x,1,2
1,x,3 all set to equal -4x
0,1,2
I made my 2x2 matrix like this
x|x,3| -1|1,3| +2|1,x|
|1,2| |0,2| |0,1|
eventually I ended up with x(2x-3)-1(2)+2(1)=-4x
condensed it down to 2x^2-3x=-4x
2x^2+1x=0
x(x+1)=0
x=0, or x=-1.
I go back to plug it in...and its wrong! :(
the equation is.
x,1,2
1,x,3 all set to equal -4x
0,1,2
I made my 2x2 matrix like this
x|x,3| -1|1,3| +2|1,x|
|1,2| |0,2| |0,1|
eventually I ended up with x(2x-3)-1(2)+2(1)=-4x
condensed it down to 2x^2-3x=-4x
2x^2+1x=0
x(x+1)=0
x=0, or x=-1.
I go back to plug it in...and its wrong! :(