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Mathematics 41 Online
OpenStudy (lgbasallote):

how to find the discriminant of \[\large \left[\begin{array}{ccc} a & b & c \\ d & e & f \\ g& h & i \end{array} \right]\]

OpenStudy (lgbasallote):

do you guys see the latex? idk why i cant see it :/

OpenStudy (unklerhaukus):

do you the determinant ?

OpenStudy (lgbasallote):

oh lol yeah

OpenStudy (lgbasallote):

sorry

OpenStudy (unklerhaukus):

ok there are a few ways to do this

OpenStudy (amistre64):

theres the "proper" method; and then theres the quicker method ... like Unkle just alluded to :)

OpenStudy (anonymous):

i use a machine as this is strictly donkey work

OpenStudy (amistre64):

... and then theres satellites cheating method ;)

OpenStudy (unklerhaukus):

i like the 'proper' method better

OpenStudy (unklerhaukus):

but i always make mistakes

OpenStudy (amistre64):

the quicker method is to copy the first 2 columns onto the end; then multiply across the diagonals

OpenStudy (amistre64):

top is opposite signed tho

OpenStudy (lgbasallote):

is this a proper method... |dw:1341493940128:dw|

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