<p>2x+3y-z=12
x-3y+2z=-5
x+z=3
What is the determinant of the coefficient matrix of the system of equations shown above?
the answer is -24, i think they're wrong. i got -6 as the coefficient.
PR (2003-2004)pg 256, #46
and finally!!!!this is my last question on my last page! im done studying for 1 week. now its time to take the practice tests.</p>
<p>[A]= [ 2 3 -1
1 -3 2
1 0 1 ] if that’s what the matrix is then the determinant is -6</p>
<p>Honestly, for this question, a calculator is your friend (at least for those of us who don’t remember matrices).</p>
<p>2nd Matrix
EDIT [A]
3x3
Type in the coefficients
2nd Matrix
MATH
det([A])</p>
<p>BAM! -6 is your answer. Despite the many steps, it took me all of 30 seconds to do that.</p>
<p>any matrix that appears just bust out your calculator
don’t even waste your time or risk making a mistake.
(I know you got this one right, but im just giving future advice)
i am actually strongly against using your calculator for many problems but for matrices i would bust it out right away</p>