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how to find the discriminant of \[\large \left[\begin{array}{ccc} a & b & c \\ d & e & f \\ g& h & i \end{array} \right]\]
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do you guys see the latex? idk why i cant see it :/
do you the determinant ?
oh lol yeah
sorry
ok there are a few ways to do this
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theres the "proper" method; and then theres the quicker method ... like Unkle just alluded to :)
i use a machine as this is strictly donkey work
... and then theres satellites cheating method ;)
i like the 'proper' method better
but i always make mistakes
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the quicker method is to copy the first 2 columns onto the end; then multiply across the diagonals
top is opposite signed tho
is this a proper method... |dw:1341493940128:dw|
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